#4 The Good Brothers
The Good Brothers - Luke Gallows and Karl Anderson, made their WWE debut back in 2016. Since then they have gone on to become one-time Raw tag team champions, which they won at this past year's Royal Rumble, defeating The Bar.
Following that, they have not been involved in a compelling storyline.
Though they have been drafted to the blue brand, it's highly unlikely they will be a part of something big there. Due to which it's possible that WWE would release them in the near future, as they don't have left much to offer now.