#1 Brock Lesnar (5-4)

The Beast has been a fixture at the Show of Shows ever since returning to the WWE back in 2012. He's defended the title numerous times including the last two years against Roman Reigns and Seth Rollins respectively. While the title is different as he now holds the WWE Championship, he'll be defending his prize against an extremely ready and hungry Drew McIntyre.
Back when he was known as the Next Big Thing, Lesnar won his first match at WrestleMania 19 in 2003 when he defeated Kurt Angle for the WWE Championship. He would then fall the following year at WrestleMania 20 when both he and Goldberg were publicly known to be leaving the company.
R-Truth wanted to 'kill' former WWE writer. More details HERE
His next showing at 'Mania was in 2013 at WrestleMania 29 where he fell to Triple H in a No Holds Barred match. The following year in 2014, however, he would pick up perhaps the biggest win in WWE history when he ended The Undertaker's undefeated 'Mania streak.
In 2015, he defended the WWE World Championship against Roman Reigns but lost it when Seth Rollins cashed in his MITB briefcase. He beat Dean Ambrose the following year in a street fight and would capture the Universal Championship from Goldberg in 2017 at WrestleMania 33.
The last two versions of the Show of Shows saw the Beast top Reigns at WrestleMania 34 but lose the title to Seth Rollins at last year's show. It's surprising that he's only one win above .500 which proves that although we may dislike his part-time status, he has put over people four times on the Grandest Stage of Them All.