#3 Samoa Joe
Post wrestling all around the world and making his way to the top, Samoa Joe has faced a plethora of challenges in WWE in Roman Reigns, Brock Lesnar, Shinsuke Nakamura to name a few. The biggest hindrance in him becoming the top draw of the company goes by the name of John Cena.
Joe and Cena are two strikingly similar characters. Both have worked day and night to reach the top of the mountain for their respective promotions; Joe in TNA and Cena in WWE. After Joe's arrival in the WWE, fans have been waiting to see a showdown between the two spearheads.
Joe even admitted that his match with Cena at UPW led to Cena's career getting skyrocketed with WWE. The platform for a budding rivalry between the two is perfect with the above story acting as a suitable base with the opportunity getting snatched away from the "Samoan Submission Machine." What can be a show-stealing feud can see Joe giving a send-off to John Cena and finally redeeming himself as the better man between the two. It could also be a start to a monstrous heel run for him.