OK, I'm gonna to say it officially: after reading all the examples of a supposedly funny Stannis, I'm now one hundred percent convinced he's one of the saddest, least humorous characters in the series. He sold Janos Slynt a classy burn, I give him that, but the rest is mostly just sad. That "good clean water" quote? That's just whining Viserys style (Viserys wasn't funny, either, intentionally or not). Inventing the clever nickname "Lord Too-Fat"? He's fat! moreover, too fat! LMAO... no, seriously not. It's a jerk jock kind of humor, at best.
Yup there are. Evil, evil, evil guys. Martin with his "everything's gray and nobody's evil" is trying to be cute. But if we follow his line of thought: nobody's truly evil, because Hitler liked dogs, then there is no context when one can say "X is evil", and in that case the adjective itself is useless and shouldn't exist.
Gregor's evil, Ramsay's evil, Kraznys mo Nakloz is evil, Sauron and Voldemort are evil (although to a lesser degree than the former three), Hitler was evil, and all of them would need quite a few more redeeming qualities for me to consider them anything but.