#4 Fit Finlay
Okay, so this one may also count as a slight red herring but for a slightly different reason. Last one, I promise.
Fit Finlay is Irish but, being from Carrickfergus, he was born in Northern Ireland and thus part of the United Kingdom.
While Finlay may not identify as British as such, I think he's definitely worth mentioning here as possibly the greatest Northern Irish wrestler of all time. He's another talent WWE could have easily strapped the rocket to as his in-ring ability was always highly regarded, but his most memorable stint may be why he was paired with Hornswoggle.
Finlay is a former WCW Television Champion and WWE United States Champion but never quite broke into the main event picture. Finlay is, however, plays a massive role backstage - working as a producer and also a trainer at the Performance Center.