Charles "Crazy Horse" Bennett is another freestyler I can think of. Gomi tore his ass up in bushido 5. I'm not sure if Bennett is mentally stable either. Bas interviewed him before the Gomi fight, and the guy literally sounded like he had a bad speech impediment or full-on tourette's.
"...They're not coming out here swinging, and brawling, and just going to spend their wad."
-Stephen Quadros "The Fight Professor"
"Can you say that?"
-Eddie Bravo, Co-Announcer