A drug dealer gimmick
The guy who sells bunch of enhancement drugs to jobbers backstage, claiming this stuff will help them beat the top guys. The shyt obviously doesn't work so he has beef with all them jobbers.
Name the guy like Hulk Michaels and dress him up like the 80s wrestler.
And when his gimmick no longer works, they could rebrand him into a scamming fitness trainer gimmick. Like the Joshua Fabia guy from UFC who used untraditional pointless training methods. He'd do meditation, singing and dancing, other BS methods and his trained guys would lose them matches in a hilarious ways.