#1 Edge (11 wins, 2 losses)
The Ultimate Warrior and Hulk Hogan were able to go undefeated during their SummerSlam careers, but Edge tops this list for sheer longevity and due to his incredible tally of 11 victories.
The WWE Hall of Famer teamed with Sable to defeat Jacqueline & Marc Mero on his SummerSlam debut in 1998, following it up a year later with three tag victories in one event alongside Christian against The New Brood, Mideon & Viscera and Droz & Albert.
He took part in another two tag victories at the event, teaming again with Christian to win the first-ever TLC tag match against The Hardy Boyz and The Dudley Boyz in 2000, and then he was part of the Team WWE alliance that defeated The Nexus in 2010.
As a singles competitor, Edge was victorious against Lance Storm, Eddie Guerrero, Batista & Chris Jericho, Matt Hardy and John Cena at SummerSlam, with his only defeats coming in a tag turmoil match against The Acolytes in 1999 and against The Undertaker in 2008.