#1 Kevin Owens

Kevin Owens entered SmackDown Live as United States Champion in the Spring of 2017. He successfully retained his title against both AJ Styles and Chris Jericho until AJ Styles was able to defeat them.
After wrapping up his feud with AJ Styles, Kevin Owens defeated the likes of AJ Styles (once again), Sami Zayn, Randy Orton, Shinsuke Nakamura, Dolph Ziggler, and even SmackDown Live commissioner Shane McMahon. Owens was even able to beat up Vince McMahon of all people. He was a staple part of the WWE title scene and was able to be part of a tag team match involving Daniel Bryan at WrestleMania 34.
When he moved over to Raw, he did fare better than his friend Sami Zayn as he was able to defeat the likes of Braun Strowman, Bobby Roode, Elias, & Bobby Lashley. However, he was defeated by the likes of Roman Reigns, Finn Balor, and Seth Rollins. While Kevin Owens escaped (quite literally) with a lucky victory over Braun Strowman at Extreme Rules, he was demolished by Braun Strowman in every way possible.
Shortly after Kevin Owens laid out Bobby Lashley in a shocking attack, he returned and felt like just another guy shortly after. When Kevin Owens eventually recovers from injury, hopefully, he will be able to shine as a face.
Becky Lynch has been challenged HERE.