Yes,
Gong ftw. They are at least borderline 'psychedelia' for me; often lumped in with the Canterbury scene bands, at least for this concept trilogy of records, but they have a distinct proggy bent. Well I basically just described space rock...
Anyhow this stuff doo-doos on Ozric Tentacles from a great height. I never investigated them outside of these but they still tour with Daevid Allen.
The Radio Gnome Trilogy 1973-74:
Brings back alot of messy memories: