In term of fight abilities/capabilities and not in term of resume?
Here it goes:
Dillashaw - 10 He's just a beast, all right. One of the most elusive fight ever. His footwork and head movement both look akward, but goddamn it works.
Mighty Mouse - 10 Can do it all, and can do it fast!
Garbrandt - 8 He can it, and he has some of the fastest hands I ever seen in MMA. But his fighting IQ is low.
Cejudo - 7
McGregor - 8 If it wasn't on the fact that I don't really know what he can do on the ground, it would be a 10, because in my opinion, only GSP is better at timing his attacks. McGregor is a machine.
Khabib - 8 Can't give more because his stand-up is ok, but not that great.
Cruz - 9 One of the most intelligent fighter, the only one that can be argue as equally elusive as Dillashaw.
Cormier - 9
Miocic - 7 Great game for a HW, but it doesn't compare to the others
Max Holloway - 8
Brian Ortega -8
Frankie Edgar - 8 He has the same weapons as GSP, without being as elusive, and without the great timing
Robert Whittaker - 8/9 Can't decide. But he's a beast.
Gilbert Melendez - 7 He's game, but he wasn't talented enough to be a champion in the UFC
Benson Henderson - 8 GSP Lite, without the striking
Bj Penn - 8 Was able to do it all, but he was way too cocky, and honestly, his fighting IQ wasn't all that great, in retrospect.
Nate Diaz - 7 Again, not that great of fighting IQ, at least, when compared to the greats.
Tyrone Woodley - 8 Don't know engouh about his ground game to give him more, but he's like a better Johnny Hendricks (minus the steroids)
Wonderboy Thompson - ? I don't know. In theory he should be able to do what McGregor is capable of, but he don't seems to be able to put it together.