Rich Franklin, trt Vitor & Hendo, Chael, Maia, & Forest Griffin.- Anderson Silva
Hughes, BJ, Shields, Condit, & Diaz. -GSP
Big Nog, Cro Cop, & Arvloski. - Fedor
Shogun, Rashad, Rampage, Machida, Cormier, & Gus.
Some of Bones competition was washed up and now today, Bones is light years ahead of everyone else.
Fedor held gold and dominated while being undersized. He was more well rounded than most his competition. Big Nog & Mirko were his only threats. Losing to Bigfoot, Werdum, & Hendo knocked him down the ladder imo .
GSP had multiple fights with multiple stars in Hughes & BJ, but besides Shields & maybe Condit or Diaz can be considered stacked competition? I don't include Johnny Hendricks because I think he beat GSP. Alves and Hardy were mowed and I'm not sure about saying Fitch & Kos were stiff competition. Maybe Fitch but GSP was better fighter everywhere and everyone knew that.
I say Anderson because he fought trt Vitor & Hendo, former champions from other divisions, & dominated and mostly finished guys who were great at his weakness in wrestling, and dominated them.