1.Fedor
2.barnett
3.lesnar
4.the winner of Velasquez/Carwin
5.Kongo
6.CroCop
7.Couture
8.Nog (if healthy which he was'nt against mir)
9.the loser of Velasquez/Carwin
10.Rogers
Since nobody else has posted a top ten, I'll use Geo's example.........
How many of these guys has Fedor beat?
Not how easily can he beat them, but how many has he actually beat?
I believe it's only 2 out of the top ten.

7 of the top 10 are in the UFC.
Now watch the nuthuggers come out with their lists of the top ten that are totally different to include 10 guys not in the UFC and Fedor has beat them all. 