Georges St-Pierre
Conor McGregor
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Georges St-Pierre leads 3 of 4 categories. Our all-time ranking places Georges St-Pierre at #2 and Conor McGregor at #11.
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The case for Georges St-Pierre
The most dominant welterweight in history and a paragon of preparation, GSP retired at 26-2 having avenged both losses. He first won the welterweight title from Matt Hughes at UFC 65 in 2006, suffered a stunning upset knockout by Matt Serra in 2007, then reclaimed the belt and never lost again, defending it nine consecutive times against a murderer's row that included B.J. Penn, Jon Fitch, Thiago Alves, Jake Shields and Nick Diaz. Famous for tailoring a specific game plan to every opponent — wrestling strikers and out-striking wrestlers — he combined an elite jab with suffocating top control. After a four-year hiatus he returned at UFC 217 in 2017 to submit middleweight champion Michael Bisping, becoming a two-division titleholder, then retired on top. His run of 13 title-fight wins stood as a record and his professionalism reshaped the sport.
The case for Conor McGregor
The biggest star the sport has ever produced, McGregor changed MMA's economics and reach while backing it up in the cage during his prime. He became the first fighter to hold two UFC titles simultaneously, knocking out featherweight king José Aldo in a record 13 seconds at UFC 194 in 2015 and stopping Eddie Alvarez for the lightweight belt at UFC 205 in 2016. His left hand was one of the most feared weapons in the sport, and his self-promotion filled arenas and drove the two biggest pay-per-views in company history. He also crossed into boxing for a blockbuster loss to Floyd Mayweather in 2017. Injuries, inactivity and losses to Nate Diaz and Khabib Nurmagomedov, plus a leg break against Dustin Poirier in 2021, clouded his later years. He sits around 22-6, but his peak dominance and cultural impact are undeniable.