#1 Eight-time WWE World Champion Brock Lesnar
While it comes as no surprise, Brock Lesnar became the youngest man to win the WWE Championship in 2002. He defeated The Rock five months after making his debut and began the first of his many world title reigns.
The Beast Incarnate has always been a main-eventer in the company, not settling for anything below that level from that point onwards. He won two more world titles before leaving the company in 2004. Lesnar would return eight years later as a bigger star, with even more glory awaiting.
Brock Lesnar won the WWE Championship twice and the Universal Title three times since 2012, with his reigns causing a lot of controversy. The idea of a part-timer becoming world champion was not met with the widest of arms.
The former UFC star would take a few months off at a time while being Champion. Regardless, Lesnar is a very successful man who has sustained a main-event-level career for close to two decades. He continues to headline WWE shows and has the chance to add to his tally at Crown Jewel, taking on Roman Reigns.