His name is Darryl Jones, you probably have never heard of him, and yet he is the Rolling Stones' bassist and has been for over 20 years. Famous bands swap out guys all the time -- Aerosmith's keyboardist in concerts is someone named Buck Johnson. It's even more complicated when a band's known lineup keeps changing (KISS has only two original members; Lynyrd Skynyrd, one). And then, with some bands, it gets weirder still.
Stuart Sevastos/Wiki Commons
Like Heart, Quiet Riot, or Gwar, who all boast a big fat zero.
Let me tell you now about Herman's Hermits. They formed in 1964 and are among the best-selling bands of all time. But most of the public knew precisely one guy: Peter "Herman" Noone. Publicity was all about him, to the point that when the label wanted the band to record new music, they just brought in Peter and hired anonymous musicians at random to do the other vocals and play instruments, correctly guessing that fans wouldn't be able to tell the difference.