#1 Triple H - 7 hours, 55 minutes and 56 seconds

Triple H has been a major part of the last few WrestleMania shows as he has battled the likes of Daniel Bryan, Sting, Roman Reigns, Seth Rollins, Kurt Angle (and Ronda Rousey) and Batista at the Grandest Stage Of Them All. Even though his win-loss record is not that great, The Game has spent the maximum amount of time inside the ring at WrestleMania.
He made his debut as Hunter Hearst Helmsley, and he achieved his first WrestleMania win against Goldust. Triple H has closed multiple WrestleMania shows with the last main event appearance coming at WrestleMania 32, where he lost to Roman Reigns in 27 minutes and 11 seconds. His No Disqualification match against Sting at the preceding event lasted 18 minutes and 36 seconds, while Daniel Bryan took nearly 26 minutes to beat him at the 30th edition of the show.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
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Talking about his last three matches, the non-Sanctioned match against Seth Rollins clocked 25 minutes and 30 seconds, Ronda Rousey’s debut bout lasted over 20 minutes while Batista’s last WWE match went on for 24 minutes and 45 seconds at WrestleMania 35.
Thus, his recent matches have helped Triple H overtake The Undertaker in this list.