User blog comment:Andrew0218/Red vs Giygas. Monstrous Rap Battles/@comment-24229600-20150201163024/@comment-5264252-20150202175830

Jekyll and Banner aren't monsters themselves, but they turn into monsters.

I'd probably count Hannibal, but he isn't insane, mindless, vicious in the same way. He's still smart, strategical, and has common sense (as much as a cannibalistic serial killer can have, anyways).