#1 Sanity
Sanity comprises of Eric Young, Killian Dane, Alexander Wolfe, and Nikki Cross. However, Nikki Cross was drafted separately to the main roster.
Sanity was one of the best stables in NXT. They had some of the most amazing matches in NXT history. After all, who can forget the fantastic War Games match between Sanity, The Undisputed Era, and the team of Authors of Pain and Roderick Strong?
So when Sanity made their main roster debut, the WWE Universe was ecstatic and thought that WWE would finally pull the trigger on three-person tag teams. WWE had New Day, the Shield, and other promising three-person teams on the main roster.
However, Sanity was used just as fodder for other teams on the main roster. They lost their debut match. Barring the win against the New Day on the SummerSlam 2018 pre-show, Sanity has done nothing worthwhile on the main roster.
On the recent episode of SmackDown LIVE, Sanity came as part of the security team for Shane McMahon, which only contained jobbers of the blue brand.