You'll get different answers from anyone you ask, though most often I see people point towards some characters that appeared in River City Girls. I personally don't care whether the RCG games drastically change a character's personality or anythin' as those games are apart of a spinoff series that aren't directly tied in with any existing canon.

If I had to pick somebody tho then I think it'd be Godai. I prefer how he's been portrayed by Arc over his creepier self in RCG.