#3 Roman Reigns
At WrestleMania 34 in 2018, Roman Reigns met Brock Lesnar for the Universal title in the show's main event. It took Lesnar six F-5's but he finally managed to defeat Reigns to retain the belt. The duo faced off again in Saudi Arabia, this time inside a steel cage, with Lesnar coming out victorious this time around as well.
At SummerSlam 2018, Reigns finally beat Brock Lesnar to win the Universal title. The reign would be short-lived though, as The Tribal Chief went on to relinquish his belt and take time off to battle leukemia.
#2 Seth Rollins
Seth Rollins won the 2019 Royal Rumble match and challenged Brock Lesnar at WrestleMania 35. A low blow and three Curb Stomps did the trick for Rollins as he defeated Lesnar to win the Universal title at WrestleMania.
The Beast Incarnate would later cash in his Money In The Bank briefcase on Rollins to win back the belt. The two arch-rivals met again at SummerSlam 2019, where The Architect scored a clean pin over Lesnar to finish off the rivalry.