#3 Samoa Joe
The current United States Champion Samoa Joe had multiple opportunities at the WWE Championship before, but didn't get to hold the title.
Being one among the TNA originals to make it to the WWE, Joe made his debut with NXT and established himself with two reigns as NXT Champion. That was the last major singles title he held in the company until he won the United States Championship.
His TNA colleague AJ Styles has already had two reigns with the WWE & US titles and has walked into WWE's big four PPV's as WWE Champion. He has done all this within three years since making his debut. But Joe did not get the same kind of opportunity from WWE.
The “Samoan Submission Machine” is proving to the WWE Universe he has all it takes to be a great heel champion, and it’s sure he’ll do the same if given a run with the WWE/Universal Championship.