As far as pure talent? The UFC is the best it has ever been
Look at how stacked FW, LW and WW are alone.
Featherweight:
Holloway
Ortega
Aldo
Frankie Edgar
Jeremy Stephens
Cub Swanson
Elkins
Lamas
Zabit
Lightweight:
Khabib
Tony
Conor
Kevin Lee
Eddie Alvarez
Dustin Porier
Justin Gethje
Chiesa
James Vick
Ragin Al
Arguably, The top 6 Lightweights in the world are the best the LW division has ever seen not named Frankie or BJ. And many may beat them in their prime
Welterweight:
Tyron Woodley
RDA
Darren Till
Wonderboy
Lawler
Colby Convington
Usman
Masividal
Magny
HW: Old
LHW: Jones, DC and Gus maybe the best the division has ever seen
MW: Imagine if we got to see Silva in his prime face contenders like Yoel, Bobby Knuckles, Rockhold, and Weidman (If he faced him earlier in his career)
Bantamweight: TJ, Cruz, Cody, Rivera. Most stacked division has ever been