2. Randy Orton (United States Championship)
Similar to his long-time rival John Cena, Randy Orton had captured nearly every major championship throughout his WWE career, with one exception being the United States Title. In 2018, The Viper finally achieved this milestone by defeating Bobby Roode at Fastlane, claiming the US Championship for the first time and becoming a Grand Slam Champion.
However, just like Cena, Orton’s reign didn’t last long either. Just a month later at WrestleMania 34, Orton lost the United States Championship in his first title defense to Jinder Mahal in a Fatal 4-Way match that also featured Bobby Roode and Rusev. Since then, he hasn’t recaptured the gold, and it is highly unlikely he’d win it again.