The Shining Stars
Primo and Epico have been performing in the WWE for a long, long time, yet the duo have failed to make it big. The Shining Stars were the brand ambassadors of Puerto Rico in July 2016 and their gimmick was dropped soon as they were repackaged as the Colons on SmackDown Live in 2017.
The Colons make frequent appearances at WWE Live Events but are not used on TV much.
Enzo and Big Cass
Enzo and Big Cass were the most popular tag team in the WWE in 2016, but poor booking decisions from the Creative team led to the team's burial. They soon parted ways in 2017 as Big Cass turned on his partner.
Both Enzo and Cass went on to have controversial careers in the WWE as Enzo became a 2-time Cruiserweight champion much to the dismay of the fans while Big Cass was released due to his tendency to go off-script on WWE TV.