#4 Big E

Another Superstar who could really benefit from a change of gimmick is the New Day's Big E. Much like the Fandango example, Big E has been a fairly fitting name for four times WWE Tag Team Champion, but one would hope that the 31-year-old will eventually be given some time as a singles star in the future.
When/if Big E does go it alone, he will need to undergo quite a lot of adjustments. The New Day might be a highly entertaining tag team, but there's a reason why none of them have really tasted singles gold since the team formed.
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They are a little too gimmicky to be taken seriously and few would accept Big E taking on the likes of Roman Reigns in one on one action while he's dancing around the ring and getting the audience to clap along with him.
Perhaps, after New Day's separation, E can take a short amount of time off and return as a monster heel under a brand new name and image. His real name is actually Ettore Ewen, which already sounds a little more 'down the line' and worthy of main event legitimacy.
Of course, there is no guarantee that this will ever happen for any of the New Day members, but after all this time, surely fans have come to realise that in their own right, each individual has talent, and in the case of Big E, this realisation is getting more and more obvious as the years pass by.