#4 Cesaro

Antonio Cesaro won the US Championship at Summerslam 2012 and his impressive work inside the ring convinced everyone that he would be a big star someday. However, his untimely split with manager Aksana halted his push as Cesaro was still green then and lacked charisma.
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Cesaro began losing matches. He was even left off the Wrestlemania 29 card. Cesaro lost his US Championship on the Raw after Wrestlemania to Kofi Kingston. Cesaro then joined Zeb Colter, and the two were soon joined by Jack Swagger.
Cesaro’s in-ring skills continued to impress everyone but his lack of charisma held him back. Currently, Cesaro is one half of the tag team, The Bar, with Sheamus. The team is highly entertaining and both Cesaro and Sheamus work very well together as a team. The Bar is currently on Smackdown Live, trying to find their way into the Tag Titles picture.
If the Bar breaks up in the near future, expect Cesaro to receive a decent push if he stays on Smackdown Live. A world title run however, is out of the question.