Alright so it seems that after Walenty Luigi, people got the impression that this is supposed to be super goofy.
However, he was basically the farthest I'm willing to stretch this. Keyboard Smasher is a definite no, I'm on the fence about Dungo but I think it's too sci-fi (think maybe the late 90s for this game), and Hulk Hogan is a real person. Just change the name and make it not explicitly WWF, and I'll accept it.
Also, we already have 2 characters of the "all brawn no brains" type (Luigi and Logan, not trying to insult them or anything though). If possible, I'd like some different characters in the future - thanks!