Hawkwind

They’ve released an enormous amount of material, but the vast majority is nothing short of terrible. Only five of their albums are truly valid (the first four studio albums and the first live one), but they are more than enough to atone for all the empty releases: hypnotic, alien, overwhelming, devastating, and of course, cosmic. The essence of Space Rock. After all, a band that is definitely appreciable that has produced some essential albums (two of them are a solid 8).