#4 Samoa Joe
Samoa Joe and Braun Strowman would be a partnership that could run roughshod in the RAW tag-team division and have the fans loving it along the way. Of course, Samoa Joe would probably have to turn face to make this happen, especially with Strowman currently being a white-hot babyface, but the potential is there.
Interestingly enough, Samoa Joe is rumored to be returning from injury soon and would be a great surprise partner for Strowman at WrestleMania 34. Not only would the fans be insanely into it after seeing The Bar absolutely dominate the division for over a year, it would also lead to a great WrestleMania moment for both men's careers.
In the end, it will be a little hard to justify due to the fact that Samoa Joe usually acts as a lone wolf, but if WWE can somehow connect the pieces together and team these two up, they certainly need to do so!