I think some combination of Nuclear, Geothermal and tidal power sources are inevitably going to have to take up the backbone of providing a secure and stable base load.
Solar and wind energy - with a diversity of storage solutions and a smart grid - will make up some baseload portion. Increased energy use efficiency has a very long way to go - especially in North America where its current use is highly wasteful. (Not my opinion but that of the Energy Physicists, mathematicians and economists involved.)
The Nuclear option is not "ridiculous" but it is seriously problematic.
Science has already found most of the solutions - what is lacking is political will and public education about realities of maths and physics and economic pragmatism.
Fossil fuels will be far better if we learn how to conserve what we have left for far more important uses than merely burning and wasting so much in heat and pollution. And heck - for genuine emergencies or critical short term back up!!
There are no magic or miracle New Energy sources - and it is foolish to think we must find such Unicorns. (If we do that is great - but we must also work with what we know we already have!)