During the second half of the 60s there's were literally hundreds of bands that formed in the wake of The Beatles. Most of these never realized much success while still others did achieve minor fame and plodded along pretty nicely for a while.
But then there were those who soaked up everything that was going on from 67 on, got some good gigging experience, maybe released an album or two of decent, but unoriginal songs and then BAM! found their own unique niche and then expertly mined it for lots of gold.
I can't think of a better example of this than......
Alice Cooper - Killer
1971

I've heard no better explanation for AC than from Alice himself:
"We realized that there were no villains in rock and roll. Everything was hippies, peace and love, and flower power. A lot of Peter Pans and no Captain Hook. I had the face for it, I had the look for it… and we were definitely not hippies."
While you were proud to talk openly about bands like Zeppelin and Grand Funk with your friends, it was a bit different with this album. And you definitely didn't turn up songs like Dead Babies when you were listening at home. This was scary and depraved stuff.
And I loved it!