Ghandi vs Hitler in a bloody deathmatch.. MUHAHAHAHAHA
but honestly Putin vs any other politician would be great also (he's got pimped up judo skills ya'know and he's russian). Perhaps he could fight Bush...
Chuck Norris vs. the Jackass gang would be fun
George Foreman (as he is now, selling grills) vs. Mike Tyson (as he is now, f**ked up)
And last but certainly not least:
Keirh Haring (homosexual artist) vs. Heath Herring (mixed martial artist) in a battle of the names!!!
I go for Ghandi, Putin, Chuck, Foreman and Keith winning im a kissing fashion)