#2 Elias
WWE has obviously been very high on Elias ever since he made his debut on the main roster, and even though his musical act always seems to get over with the fans, he's still one of the best heels on the current roster, and probably should get a title shot at some point in the near future.
An Elias vs. Kofi Kingston/New Day feud would probably be pretty entertaining if done right, and who knows? Maybe WWE will end up putting the belt on Elias if they end up doing this match after Super ShowDown.
Regardless, as long as Kofi Kingston is WWE Champion, he'll need an effective heel to work with, and Elias is one of the few effective heels that the company has. Sure, he might not be the greatest in-ring technician, but he always seems to get a big reaction from the crowd, so he'd be a great opponent for the current WWE Champ.