There isn't much of an arguement here, it's obviously Fedor...
He beats the best strikers at striking (Cro Cop)
He beats the best ground fighters on the ground (Nogueira)
He can also throw people to the floor when he bullrushes them.
He can do whatever he wants.
Fedor fights I want to see..
Fedor vs. Josh Barnett
Fedor vs. Randy Couture
Fedor vs. Tim Sylvia -
Fedor vs. Andrei Arlovski -
hmmmmm, i wonder how many become reality..