NOBODY... I think Anderson beats Vitor, then Marquardt, then a 205er and then loses to RJJ in boxing so it doesn count i this discussion.
LHW-Forrest Griffin, Lyoto Machida, Rashad Evans & Gegard Mousasi
WW-All hail GSP
FW-Kenny Florian & Mark Hominick
BW-Don't really have one but I love their fights