1. Fedor
2. GSP
3. Jones
4. Silva
5. Might Mouse
6. Aldo
7. Dom Cruz
8. Volkanovski
9. Khabib
10. Daniel Cormier
11. Usman (more for his work prior to the title then his work as champ)
These Guys I have a hard time anyone thinking Izzy is above... then the list gets subjective... what are we ranking... BJ penns wins over Hughes and Gomi are better than anything Izzy ever did(his best win on paper we was an Ancient AS... his real best wins are going 1/1 with Pereira and should be 1/1 with Whittaker)
The list of guys I would put around Izzy in absolutely no order at all.
Holloway, Hughes, Couture, Big Nog, Wanderlei Silva, Gomi, BJ Penn, Dan Henderson, Shogun Rua, Chuck Liddrell, Tito Ortiz, Rampage Jackson...
Israels record looks better than these guys on wins/losses and Championships... but... they had to fight way worse killers than Marvin Vettori, 38 year old Cannonier, 43 year old (and izzy didn't even fight him) Yoel Romero, and Paulo (can't win a fight) Costa ...
I mean shit.. even Pereira is actually really old and should be eyeing retirement but he is also in a super weak division where he can just strike with guys and never worry about a real wrestling threat (both Vettori and Whitaker are not offensive wrestlers for shit)
so I guess it depends on you... do you care about the actual opponents or just the win/loss and title fights...