#2. Braun Strowman

In a way, it's kind of surprising that WWE has never had this match at WrestleMania. In 2017, Reigns and Braun Strowman had a constant on-and-off rivalry, and there were very few times where they failed to deliver.
Good friends in real life and better enemies on-screen, Strowman doesn't even need to turn heel to feud with Roman Reigns. They've proved more than enough times that they're perfect dance partners, and in hindsight after Reigns' career comes to an end, there's no doubt that Strowman will go down as one of his all-time great opponents.
Moreover, Strowman keeps getting a start-stop push, and some stability would do. A match against Reigns with a good stipulation could see one of the most intense matches in WrestleMania history.
And after all, what's better in wrestling than chaos? They don't even need to have an extensive, technical match. A Brock Lesnar-Goldberg III type of match could easily create a lot of buzz.
Becky Lynch has been challenged HERE.