#3. Roman Reigns
For some reason, not as many people realise that Roman Reigns is and has been the WWE locker room leader for a while. It makes complete sense that he has some influence of sorts over Vince McMahon, particularly since he's been pushed as the top star of the company for years.
Roman Reigns has been an integral part of WWE programming since his rise to the top. Sure, he has been a polarizing figure (though the months since his remission has seen him gain favourable reactions) but overall, he still holds an extremely important role in the company.
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When Roman Reigns says something, superstars like McMahon listen, because he knows that he's the locker room leader for a reason. While Reigns hasn't been known to explicitly use this influence of any sorts, there's no doubt that as time goes on, his leverage with the company will only increase.