Queen of the 1970s was & is influential. Great music! Freddy's voice is amazing.
But best of all? The Beatles of the 1960s for sure. Can't judge them solely for their original music, but the Beatles served like a sort of ice-breaker, with tremendous wide-reaching social influence, breaking up the frozen-as-ice strictly-structured stiff forms of society in many ways. Beatles pioneered new forms and instruments (sitar, tabla) in music, drugs, sponsorship of Heinz Edelman's (similar to the Peter Max style) psycholelia art, more widespread investigation into Eastern philosophy, original things done in film (Yellow Submarine, music videos), social protests (Concert for Bangladesh, lots more); even helped losen up the ways in which people interacted in society at large. The Beatles didn't do it alone, but they were like T H E leading public bellwether of social change in countries all over the world.
Led Zepplin was essentially a cover-band. Yeah it's great to hear Paige's rippin ax mastery, but the true historical fact is, hardly any of LZ's recorded stuff is original. It's almost all covers, although they try to hide that fact. Majority of their stuff is stolen, mostly from Mississippi Delta Blues tradition, and folk music stolen from some other countries too. LZ is the personification of a line from Frank Zappa-they're mostly in it for the money.
Pink Floyd has been getting lots of air time on my local stations. Had musical influence, but not in same league of widespread, all-pervading social influence like the Beatles.
It's good to be back home!