To continue with that (EDIT mainly) early seventies vibe when British rock ruled the world get in addition to every Progressive Rock album of the time, everything recorded between 1969 and 1973 by the Who, Free, The Faces, Rolling Stones, Deep Purple, Led Zeppelin, Atomic Rooster, Wishbone Ash, Mott the Hoople, Alex Harvey, Rory Gallagher (he was Irish I know but I don't care) etc etc.
Times never to be repeated
Oh and every folk rock and singer song writer album too (particularly Roy Harper, Nick Drake and John Martyn)
Phew
.....not to mention David Bowie, Roxy Music, Moody Blues. Procol Harum, Supertramp even Elton John; the musical peak in rock. AIMHO