Fakewood Mac, page-8

John is a superb bass player.

Fleetwood is the enigmatic - sometimes demonic - face of the group.

Ultimately they decided to bring Lindsey and Stevie into the band, and the combination of an established group + the talent of the newcomers created a multi-million selling hit machine & cultural phenomenon. Christine Perfect also an important talent in the group with her warm vocals and gifted song-writing.

'Fleetwood Mac were no good after Green left'
'Genesis were no good after Peter Gabriel left'
'Roxy Music were no good after Eno left'
'Genesis were no good after Steve Hackett left'
etc
etc
etc
It's a cliché.