#1 The Romantic Touch
The Romantic Touch is an example of a self-aware wresting gimmick. ROH realized that fans were used to the 'masked confusion' story lines and decided to play on the trope.
Rhett Titus had been forced to 'retire' from ROH after his SCUM faction lost their match, and returned shortly after as The Romantic Touch. Mostly an enhancement talent, he was in an interesting angle with Veda Scott, who seemed to be the only one--other than the fans, of course--who realized Rhett Titus was the man under the mask.
An unsubstantiated rumor had it that Titus was given the Romantic Touch gimmick as a way of using him for enhancement purposes without hurting his image as Rhett Titus. In any event, he would abandon the gimmick and re-form the All Night Express with Kenny King in 2015.
There you have it; Ten not-so-mysterious wrestling acts, and ten entertaining story lines.