#1 Cesaro (WWE United States Championship)
One of the most accomplished tag team Superstars in recent WWE history is Cesaro, who has teamed with a host of names. The Swiss Cyborg has won Tag Team Championships with Sheamus, Tyson Kidd, and most recently, Shinsuke Nakamura, who is currently Cesaro's partner.
With most of his highest-profile work coming in the tag team department, as well as his failed singles push in 2014, it may be easy to forget that Cesaro is a former United States Champion. In fact, he won the title within months of debuting on WWE's main roster.
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He kept the US Title for close to eight months, defending it against a variety of undercard opponents like R-Truth and The Miz. Cesaro even retained his title over WWE Hall of Famer Sgt. Slaughter at one point. While it was a decent reign, he hasn't seen any singles gold since.
Cesaro would be an excellent Intercontinental Champion today, mixing it up with the likes of Sami Zayn and Daniel Bryan on a weekly basis. But for now, the United States Championship remains the only singles title he has held in WWE.