#1 Brock Lesnar - WWE
Brock Lesnar had one of the greatest rookie years in WWE history. Being billed as The Next Big Thing and being managed by Paul Heyman, he had plenty to live up to. Lesnar did that, and then some, when he won the 2002 King of the Ring and defeated The Rock at Summerslam 2002 to become the youngest WWE Champion in company history.
Brock continued on to have a magical two-year run with the promotion, winning the WWE Championship two more times including over Kurt Angle at WrestleMania 19. He departed the WWE after a much maligned bout against Goldberg at WrestleMania 20. Lesnar went on to have stints in the NFL, NJPW and the UFC, becoming the IWGP Heavyweight Champion and UFC Heavyweight Champion.
Brock Lesnar made his triumphant return to the WWE on the Raw After WrestleMania 28 and attacked John Cena. After a loss to Cena at Extreme Rules, he defeated Triple H at Summerslam 2012 and CM Punk at Summerslam 2013. This all led to the biggest victory of his career, beating The Undertaker to end his legendary streak at WrestleMania in one of the most shocking moments ever.
This win at WrestleMania XXX would be a turning point in the second stint in WWE for The Beast Incarnate. Lesnar defeated John Cena in the most one-sided Summerslam main event of all time to win the WWE World Heavyweight Championship. He held the gold for 224 days and went on to win the title again in 2019.
Goldberg returned to WWE himself and beat Brock Lesnar convincingly at Survivor Series 2016, but Lesnar would get his win back at WrestleMania 33 when he beat his rival to win the WWE Universal Championship. He held the title for 504 days, the longest reign in the history of the championship. Brock went on to win the Universal Title on two more occasions.
Brock has many accolades and has produced many classic battles along the way. Whether it be his Survivor Series clashes against Daniel Bryan and AJ Styles or his title defenses against Roman Reigns or Finn Balor, Lesnar doesn't get enough credit for being an exceptional worker still to this day.
Brock Lesnar has created a legacy unlike anyone before him. His run of dominance has been unparalleled. His first stint with the company was unforgettable, but his second stint has etched his name among the greatest superstars in company history. Brock Lesnar has to be recognized as the WWE superstar whose second stint was just that much better than his first.
Becky Lynch has been challenged HERE.