#6 Roman Reigns and Dean Ambrose
Opposites attract and this is a perfect example. Reigns is the quiet type while Ambrose is the wild child. If you have seen Ride Along, you can see how this is exemplified. The two men would work together from FCW to NXT, and then debuted together along with Seth Rollins as The Shield.
They went through it all during the course of the faction and WWE played on their friendship since The Shield split up. Even in their battles against each other, it is almost as if it is an understated motive as they two battle it out.
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But when the match is over, the two men almost always seem to congratulate whoever the winner is, and they have no shame in displaying their bromance for the world to see.