https://en.wikipedia.org/wiki/Cost_of_electricity_by_source

Scroll down to the data for The United States.  Geothermal is the cheapest where it's available.  Hydro-electric is the 2nd cheapest, again where it's available.  

Onshore wind runs pretty close to natural gas, but since the wind doesn't always blow, it's an added infrastructure cost, not an alternative one, because we always have to maintain conventional sources that work all the time for with the wind doesn't blow and the sun doesn't shine.

Nuclear is about 10% more expensive than natural gas, but is less expensive than bio-mass, PV Solar, Solar Thermal, and offshore wind.

And you're right, nuclear isn't renewable.  The sun works on nuclear fusion and will eventually run out of fuel, which makes nothing that happens now relevant in the long run.  That said, France gets about 70% of its electricity from  nuclear, and they recycle their spent fuel rods.  Why don't we?