~20 year old Vitor would be fun to watch. That hand speed.
In case one simply wouldn't like to fight, I'd just bring a big fucking guy with good chin. Who'd start a fight with Mark Hunt? Can't imagine very many going after people like Mark Coleman, Kevin Randleman, Brock Lesnar, Ron Waterman, Overeem, CroCop, Arlovski etc. Bobby Lashley would also be a good candidate to stand beside just to avoid getting into trouble. If I actually wanted to see a fight, I'd probably go with someone like Robbie Lawler, who I can imagine some idiot starting a fight with. I just can't imagine anyone winning.