>

I would also like to add that as someone intimately familiar with West Texas Towns like Lubbock, Midland, and Odessa, you don't have to go as far as you are talking. 
You specifically mentons As someone who has never experienced seasons, been in forests, swam in lakes, or been "out there in the wilderness" (literally, my hometown is just 100F weather, potholes and shrubs. Yes I live in Texas!)."
You could have an absolute blast just driving from West Texas to say, Little Rock Arkansas or Nashville Tennessee. Long drives, but you will slowly see the Mesquite get thicker, then change over to salt pines, then transition to lush forest. There are tons on state parks and open trails you can explore in deep woods. Plenty of rivers and lakes to swim in. 
You will not go swimming out in the wilderness in the places you mentioned. You will likely not go camping in the places you mentioned. The barrier to do so outside Little Rock or Nashville is very low, and it's much cheaper to get there. Also, as someone from West Texas you can absolutely be wowed just be the regular old forests of the Eastern United States. Alternatively, the drive up to Denver and the mountains to the West of it can be breathtaking.
If you've never been East, go East my friend. Yes, the places you mentioned are spectacular, but everything is spectacular compared to rural West Texas. On top of that, you could drive there in a day. Petit Jenn is a random State Park in Arkansas. 10.5 hour drive from Odessa Texas. Swim, see trees, explore the forest, bring a tent or rent a Yurt to sleep in. You could easily do this in a long weekend this spring for under $500 all inclusive.
Good luck to you!
And... Canada/Alaska (Specifically the Northwest) are still prettier.
I should note that you're comparing a couple of small countries to a huge area of North America. Scenery in Canada is quite diverse, and trying to generalize the scenery of Canada is like doing the same for the US. >

Norway is not really small. From south to north is further than San Diego is from Vancouver. This means that climate and nature varies a lot from south to north >

Better is subjective, and affordability/accessibility definitely play a role in what will be better for you.
The scenery is a backdrop for experience. What do you actually want to do? Hike? Why not save and visit Alaska, have an experience there, and then build on that when you eventually are able to visit Iceland? >

I’ve been to both Alaska and Norway. 
I went to Alaska for 10 days in August of 2019. We rented an RV and road-tripped from Seward to Fairbanks. At this point I had never visited Norway, but the area around Seward felt like a very Norwegian landscape. Alaska was by far the prettiest place I had ever visited in North America. 
I spent 2 weeks in Norway this summer. Rented a car in Bergen and drove along the west coast up to Trondheim before looping back down to Lillehammer and back to Bergen. I can’t even pretend that Alaska was anywhere near as breath taking as the fjords in Norway (further inland was not as pretty but I think we were spoiled by starting our trip off with a bang). 
My advice is:
If you have more time than money, visit Alaska/Canada. You can road-trip and even car camp if you’re into that. 
If you have more money than time, visit Iceland (I haven’t visited but several of my friends have and say a week is plenty, but things are more expensive there) 
If you have plenty of time and money, visit Norway. I wouldn’t recommend less than 2 weeks, it can be expensive and time consuming to get there, and everything is more expensive while you’re there. >

So you think Norway is overall more breathtaking? >

Yeah. 
Don’t get me wrong, Alaska was one of the prettiest places I had ever been…until I saw Norway. My brother and I literally would just pull over on the side of the road and stare. >

I'm not saying I have an opinion on which is better, but it seems your opinion is lacking actual experience. Pictures/media can be misleading, and it might be worth actually visiting places and experiencing them for yourself before forming a solid view like that.  
Also, they can be different without one having to be better than another. >

Canada is massive and has a wide range of climates and scenery. Which part of Canada? >

Yukon Alberta and BC >

Being Canadian (plus one that has been to many rural/isolated locations) and having lived in Europe I can answer some of this. 
Both Norway and Iceland are nice. Iceland is small though and Norway, well expensive, but it is beautiful. 
Here is the thing, what most people see of Canada is a small fraction of what is available, because most is inaccessible to all, but the most adventurous. This goes for Canadians as well who mostly live within a 100kms of the border with the US. Our country is as big north south in size as it is east west in width. Which means you have much of the country untouched except for sporadic first nations villages and settlements. 
Sure you have the Niagra falls, bay of fundy and west coast of vancouver island to lure the casual tourist. But have you seen Baffin Island? Or paddled the Artic ocean or spotted polar bears in Churchill. How about jump on a motorbike and go drive the dempster to the article ocean?  Never mind hike the sand dunes in Saskatchewan. Bet you didn't know about those, don't feel bad, most Canadians don't either. 
It wasn't until I started exploring the backwoods that I started seeing the true beauty of our country.  And that is after having lived and travailed the world. Remember flying into a community close to the NWT border and all I could see until the horizon was lakes and trees with a tiny community poking up from the lake shore. The beauty of both the people that make that tiny hamlet home and the land itself that impacts those folks. Oh and the northern lights. 
Or I can go on about being in a quiet northern cove with my dad on one of the boats he would captain... and hearing the barking of the sea lions and the bald eagles flying above and seeing starfish so big they could eat my little head. 
I could talk about my experience volunteering with dog sled races in the dead of winter and beauty of the snow, the cold, and the magic of a tradition that spans 1000s of years.  I can't even begin to cover all of Canada and what it has to offer.  But to say it is less than Norway or Iceland, tells me you haven't seen much of Canada. Because we have what they have. Even geothermal hot pools. Just might have to hike through thick forests to get there. lol.  We also have Fjords and the northern lights. 
One of my favourites was hanging out on the local lake by my backwoods cabin.  The lights from the few ice shacks would glow against the ice and snow.  My dog and I would snowshoe in the middle of the night to watch the stars and often northern lights dance across the sky.  Coming back to the warmth of our cabin to wrap up and read a nice book by the light until we would fall asleep, magical. i am now stuck in the city due to work. But my goddess, is there beauty our there if you know where to look. >

Ok, having read the other replies -- if you have 2 months, and a car, ideally start in the late summer and drive north. Go to Custer State Park in South Dakota (do not try to pet a bison), do NOT go to Mt. Rushmore, go to Montana, drive up to Glacier Nat'l Park, then go up to Canada. 
Go to Banff. Spend a few days. Go WEST to Vancouver. Go to Kits, go to Van Island. Go to Whistler. Drive around North Van. Go spend time in the city. Then get on the 1 and go EAST. Stop again in Banff, Jasper, etc. Go all the way to Ontario, drop down and go through Vermont, stop in little towns. Keep going south, stop in Boston, do the trail. Stop in NYC, drive southwest, go back to Texas and make plans to move north for good. >

American Here:
I've been to Iceland, Canada, and Alaska. Never been to Norway. Alaska and Canada are hands down more beautiful than Iceland, but I'd still recommend you go to Iceland.


Have you ever watched Star Wars Return of the Jedi? The Pacific North West, up through and including Western Canada and the islands of Alaska look just like the Forest Moon of Endor. It is where it was filmed. You can take a cruise up through the islands from Seatle up through Fairbanks and float by coastline of beautiful islands, see whales, dolphins, Eagles, bears. It is absolutely gorgeous.


Iceland is pretty desolate. Have you seen Game of Thrones? The North? The island has its own sense of beauty but its all driving to a rift, a volcano, or a waterfall. The island itself has very few trees and is basically a giant field of moss when it is green. It's still pretty, but most of Iceland is the same where there is variety in what can be seen in Alaska/Canada.


Against Alaska/Canada, you can absolutely visit a nasty swamp filled with mosquitos. No Mosquitos in Iceland.


All the places you mentioned can be beautiful, but I personally think you would have more fun in Iceland. While it is not as pretty as the Pacific Northwest, it is still beautiful in its own way and there are more things to do accessible to you. Iceland really isn't that big, and you can easily and safely rent a car and drive around. Everyone speaks English (at least every place you would go) and there is plenty to do. See the city, drive the ring of fire, hike, bike, go to a hot springs, eat weird food. When I went it was relatively cheap to get there ($400 round trip from NYC pre COVID) but bear in mind everything is more expensive there. Like a coke at the grocery store is $3. >

If they only have 1 week, Iceland is pretty small and you can see most of the good stuff in that amount time. Iceland has volcanoes which is cool.
If you have the time to travel, the Rockies and Alaska hands down. The Banff to Jasper highway is jaw dropping and puts Iceland to shame and you can do it in a day but then it's a crazy long drive to Anchorage. You need to plan your trip carefully >

I do have a lot of time! >

So a few things Iceland is fun and beautiful and unique for about a week.  The island is tiny as shit in comparison. Great trip get to see a lot of sights near each other. Only 1 of the 4 with geysers.
Norway is fun interesting and the cultural difference is so different that would likely be more of the appeal then the views. Like the viking villages are awesome!
Now Canada has Niagara falls fucking great but they also have about 30x the area for your different wonders to explore also Canada has a lot of bigger mountain and cool waterfalls from my experience dose greatly lack as much cool history.
Alaska is simply the smaller more redneck Canada still like 5x the area of Norway.
So Europe is smaller but cool history nothing super special. Canada and Alaska are huge and likely much harder to see as many unique and fun places in a short vacation. >

How do you quantify "better scenery"? 
But if you want to leave Texan desert (which have its own appeal) there are plenty of amazing hiking trails much closer to you. Appalachian Trail or Rocky mountains are great. >

Either Alaska or Canada is multiple times bigger than Iceland and Norway combined. 
Are you spending months and going to have the ability to see plenty of places in Canada and/or Alaska, or are you spending a week and hoping to stay within a certain area for the majority of trip?
While on the trip are you also going to want to explore the culture of the location, as in going to dinner or shopping at local stores? 
As others have pointed out, better is just your opinion, so there's no need to try to change your mind. However assuming you aren't a billionaire there is going to financial constraints so the amount of time you can spend, travel costs, food, etc, are all things to take into consideration, because on top of seeing the "better" scenery, you probably also want to enjoy the other aspects of the trip too. If you're miserable and starving, a beautiful view isn't going to be quite as beautiful. >

As someone who has visited Iceland several times, how much have you budgeted for Iceland? How many days and what car have you rented? >

I have 2 months but only enough money to do one place! >

You're planning on going to Iceland for 2 months? >

No, if I chose Iceland I would go for 2 weeks and go home cuz my budget would be gone >

What time of year are you going?
Are you planning on camping? Renting a car? 2 weeks in Iceland ain't going to be cheap