All things considered, I would say that MC has a GS superior even to TW's, if that's possible. Not to mention that he has the advantage of a superior body and, possibly, mind as well (I know that the Dream God comments that TW had "unshakeable will," but let's agree that his mind was anything but stable).
As for being the most powerful god, I would say that MC has a good chance (although I recognize that it is not relevant to us). After all, TW wasn't exactly seeking to be the most powerful, and he was a baby compared to the other gods. I kind of thought that in divinity, TW's physique was no longer relevant and that all gods basically had the same abilities that his physique provided, but the conversation with Yue Yan confirmed that this is not the case.