#4. Kamaru Usman – UFC welterweight champion
Kamaru Usman, the reigning UFC welterweight champion, is widely considered the best pound-for-pound fighter actively competing today.
'The Nigerian Nightmare' haunted the division during his rise up the rankings at 170 pounds. He became the champion following a dominant unanimous decision win over Tyron Woodley in 2019. Ever since, Usman has defended his belt five times.
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Usman already has wins over three of the top-five fighters in the welterweight rankings. He has beaten top contenders Colby Covington and Jorge Masvidal twice already and is set to square off in a rematch against Leon Edwards in his next title defense.
Over the last few years, Usman has emerged as one of the most well-rounded fighters in the world. His wrestling background saw him trailblaze up the rankings and his newfound propensity for knockouts has added to the aura of invincibility that surrounds him. His last professional loss came in 2013 and he's currently riding a 15-fight win streak in the UFC.
At 34, Usman has revealed on numerous occasions that he intends to retire after a few more fights. He has hinted at moving to another weight class in pursuit of double-champ status and the public consensus is that 'The Nigerian Nightmare' is in the final stretch of his career.
One fighter who could potentially beat Usman is Khamzat Chimaev. 'Borz' remains an ominous presence in the weight class and has a similar skillset to that of the reigning champion.
Chimaev is reportedly set to square off against No.2-ranked Gilbert Burns in his next bout. A win over 'Durinho' would likely see the Chechen-born Swede take on Usman next, provided he can get past Leon Edwards.
#3. Georges St. Pierre – former UFC welterweight and middleweight champion
Georges St-Pierre, at the height of his powers, was one of the most dominant champions in UFC history. After winning the undisputed title in a rematch against Matt Serra at UFC 83, St-Pierre defended his welterweight title nine times.
During his incredible run in the 170-pound weight class, St-Pierre secured wins over Jason Miller, Frank Trigg, Sean Sherk, Matt Hughes (twice), Josh Koscheck (twice), Matt Serra, John Fitch, B.J. Penn (twice), Thiago Alves, Dan Hardy, Jake Shields, Carlos Condit, Nick Diaz and Johny Hendricks.
What made Georges St-Pierre special was how incredibly well-rounded he was. He could strike with the best stand-up fighters in the division and, somewhat surprisingly, out-wrestled seasoned wrestlers during his reign. Irrespective of his opponent's strengths, St-Pierre always found a way to win.
Following his narrow win over Johny Hendricks in 2013, 'Rush' vacated the belt and took a hiatus from the sport. He returned to the octagon one final time in 2017 when he took on then-middleweight champion Michael Bisping. The Canadian legend choked out Bisping to become a two-division champion.
Watch UFC fighters reflect on George St-Pierre's legacy in the video below: