He is #1. What I'm saying is that he is small for a HW, and talented guys with a clear weight and height edge will be challenging to him.
BArnett, Mir, just to name these two. His bro in 2-3 years. IMO Fedor could cut to 215 and fight at 205 if he chose to. In this fight against Goodridge he was thinner than he is now.
In his first with Mino and Herring, we saw just how brutal his G'n'P can be. We saw very quick subs in other fights, and good standup with POWER againts Big Daddy and Fujita. Who else has stunned Fujita like that? His balance and intelligence is top notch too.
Talented guys will always be challenging to anybody, that's why we say they're talented. Talented guys with weight and/or height advantages will obviously be more challenging.
Fedor would finish Barnett and Mir in the first round, I think. He's too fast, too powerful, too knowledgable at subs, too aggressive, and too good a wrestler for either of those guys to handle.