#2 The Good Brothers
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Karl Anderson and Luke Gallows were one of the main highlights of the Bullet Club in New Japan Pro Wrestling (NJPW). In 2016, their contracts ran out and WWE signed them. Fans were excited to see how WWE would use both Superstars.
They had a great run as heels and with AJ Styles also being in WWE, the company aligned the trio and formed The Club. This alliance quickly became a dominating team but due to creative reasons, Anderson and Gallows lost all their momentum once WWE started pushing Styles as a singles performer.
Both Superstars won the Raw Tag Team Championships but since losing it to The Hardy Boyz at WrestleMania 33, we have not seen them on television often. And it's not surprising that this led to them rejecting a contract offer from WWE. Their contract will run out this September and we can expect them to leave WWE.