#1 Bo Dallas
Bo Dallas is a gifted performer, and the same was evident during his Bo-Lieve gimmick, however, the fans as well as WWE never quite paid heed to his work--since Dallas' overall character failed to click as a top-tier Superstar. Subsequently, Dallas became relatively obscure.
Regardless, when he joined forces with The Miz, Dallas' popularity shot up again--as the fans were always rooting for The Miztourage, despite the team being heels. The very fact that Dallas began garnering significant reactions from the fans, goes to show how much of a positive influence Miz had on his career.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
A relatively simple gimmick as one of The Miz's lackeys made him relevant again. Furthermore, after The Miz moved to SmackDown Live, Dallas and Curtis Axel formed The B-Team which is perhaps the most beloved tag team gimmick in the WWE right now.
Given the highly-positive influence The Miz has had on multiple WWE Superstars' careers, it'd be safe to say that the A-Lister not only furthers his own career, but also elevates his peers' careers--taking them to the "A Level", so to speak.