Compelling Startup Pitch Archetypes (with examples from YC companies)
Another one: high-margin city-level business that can be repeated in every big city in the world.    Brick and mortar: Starbucks, Jamba Juice, McDonalds, Whole Foods, Wal-Mart, Kumon

    Online: Groupon, Uber, Yelp, RedBeacon, SkillShare, Thrillist

There are around one thousand cities with 1M+ population.
If you can build something novel with 1M$ annual revenue and 20% profit margin that can be repeated for every big city, you can raise in order of 100M$ for global scaling.