I'll take the one that's a real power based upon a real character.
If Omnivastance is a real power, what about Hyper-Omnivastance? Or maybe Mega-Hyper-Omnivastance? Or maybe... you get my point.
Although DYBAD did once make up a power called Omni-Creator, which postulated that all the Omnipotent Beings were the same entity wearing different hats. It resolved a number of paradoxes quite beautifully. But that was still "only" Omnipotence.