True, but Darkseid >>>>> Every villain in Marvel
Breh can exist outside of the universe
Which is basically Superman. The only thing that could contain Superboy prime is the Source Wall which is saying something
Calling it 100% straight, all of the established heroes and villians are less powerful than the abstract gods of BOTH universes. Thanos and Darkseid are more or less "the biggest bads" of Marvel and DC, but there are characters who's power and scope exist far beyond theirs.
For the sake of the thread, I thought the point was focusing on the main notable villians, unless we are going to go to Eternity/Infinity/Spectre levels?