#1 Brock Lesnar- 504 days (Universal Champion)
And on No. 1 we've got the beast incarnate who held the Universal title for an unbelievable 504 days. Brock Lesnar is once in a lifetime of an athlete who has accomplished loads of success in his glorious career.
It was at Wrestlemania 33 when Brock Lesnar finally defeated his longtime rival, Goldberg and became the Universal Champion.
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The beast faced numerous challenges in the form of Braun Strowman, Roman Reigns, Samoa Joe and more but once the second bell rang, the announcement was the same on each and every occasion.
Lesnar was often blamed in his reign for not showing up or fighting a limited amount of matches, some often called him a part-timer who did little to bring prestige to the Universal title but in the end when we stroll down the history lane in say about 10 years, it will just say one thing- Brock Lesnar held the Universal Title for 504 days!
The Beast's reign was ended by Roman Reigns as the Big Dog defeated him at SummerSlam and became the new Universal Champion.