Man-Bat, Solomon Grundy and even Clayface wouldn't be good choices. Not because they're bad antagonists, but because they're far too supernatural for a movie trilogy who is desperately trying to keep itself grounded. I might be permanently biased against Freeze after seeing Batman & Robin completely ruin the character, but seeing as this is the end of the Batman movies and possibly the end of Batman, I simply don't think he'd be able to pull it off. Bane is literally the only human-like antagonist at this point that can overpower Batman in every single way and his aggressive attitude is something that I believe is necessary for this final installment.
I will admit that I might have been a bit hasty with counting out the Riddler, as the possibilities are endless, but the idea of a rabbit hunt (or something, I forgot the right name for it) kind of put me off initially. I still stand by the idea that a criminal mastermind who has both the intellect and physical superiority over batman is a decent choice, but I can see your point. Whether Bane looks well in the movie is another question entirely.