I have to cast my vote for Hazama from the BlazBlue games, He is so FUN! He so delightfully evil I can't help but love him.
His entire role in the plot is him basically rolling around other people's story modes ruining their day then showing up to wreck face in the final boss stage in his Unlimited Mode. He outclasses everyone in the cast by far, he never even considers them a threat to him pretty much. He is faux-modest about it just to be more hilarious.
"I'm not really the
fighting kind of guy y'know?"
He only hates Rachel, not because she is one of the few who can match him in a fair fight but because she has a habit of saving his would be victims by teleporting them out at random.
"Damn vampire! You LIVE to cockblock me don't you?! Well UNlive. You get the point"
He is also one stylin' dude.
Tell me that isn't the most stylish suit you have ever seen?