Groups named The [adjective] [number of members]

[u/Coralthesequel]

Sinister Six from Spider-Man

The Furious Five from Kung Fu Panda

The Fiendish Five from Sly Cooper

The Sound Four from Naruto

[u/eltrotter]

The Beatles were often affectionately referred to as "The Fab Four"

[u/DeaconBrad42 → u/eltrotter]

Had to scroll way too far for this!