There are a few seventies bands that passed completely — and I mean completely — under the radar, that should have been noticed. They just didn't get any back-up in terms of promotion by their label.
And here I'd like to make an honourable mention for:
Riff Raff. The second album is not very strong, but the first is just excellent. It was founded by two guys who worked with the also good but a bit better known Mark-Almond (and no, that's not the eighties guy who sings in a weepy sort of voice).
Greenslade. Again, the first album. Founded by Dave Greenslade, who cut his teeth with Colosseum. Had the unusual feature of two Hammond organs. And the fine bassist, Tony Reeves. Wouldn't want to make out that it's a masterpiece or anything, but a good album which should have got more attention. Saw them at the Marquee (Soho) a couple of times. Remarkable sound on stage, with the two Hammonds swirling round each other, as you can imagine.
Flash. First two albums, plenty of quality. Very seventies sound, of course. A spin-off of Yes. Excellent guitarist Peter Banks (who had basically been given the push from Yes, God knows why). Very composed pieces, with all sorts of time signature variations. And generally good musicianship. Their weak point, in my view, was the vocalist, Colin Carter. LIke Yes, the bassist played a Ricky, and that always gave a very particular sound to any group. Again, saw them at the Marquee, at least a couple of times.
Two very fine album covers for a perv like me, incidentally. The sort of thing you wouldn't get away with now (sob…)
I'm not saying any of these are geniuses, but music that I still listen to with pleasure (albeit very much of its time, of course). They got no attention whatsoever.