6. Dolph Ziggler
The Showoff stole the show as US champ between June and December 2011. Ziggler, with Vickie Guerrero in his corner, took the title from Kofi Kingston at Capitol Punishment and enjoyed six whole months with it. That's 182 days to those of you counting at home. Ziggler survived a Fatal 4-Way match at the Night of Champions against Jack Swagger, Alex Riley and John Morrison. He followed that up with successful defences at Vengeance and Survivor Series before losing to Zack Ryder at the TLC pay-per-view.