9. Corporate Kane
WWE fans were distraught when Kane walked out to the ring without his mask, wig, pyro, or wrestling gear in 2013. Instead, we got an unmasked Kane slowly strut down the aisle in a business suit ready to... observe The Authority's carnage. That was the moment we all met Corporate Kane.
This wasn't the Big Red Machine. This wasn't the Devil's Favorite Demon. This wasn't the fire-breathing monster. It was the Director of Operations for the Authority, designed to do their bidding and nod along to whatever they asked.
It's hard to say whether the gimmick was a success. Yes, Kane joining The Authority was a shocking moment that made fans upset about what they had done to the beloved monster, but it also resulted in him becoming little more than a lackey, watching along from ringside or losing matches in the most bland attire imaginable. Sure, fans disliked him for all the right reasons, but they also disliked him in general because Corporate Kane was tarnishing The Big Red Machine's legacy.
Glenn Jacobs certainly committed to Corporate Kane, but the character only got good when they leaned into the Jekyll and Hyde/split personality between Corporate Kane and Demon Kane. That's when Jacobs could truly let loose with his performance, and it was all worth it to see Kane return to his monstrous roots. That aside, Corporate Kane lasted far too long, and it did more damage to the character than good.