Who dominated the '70's? As far as I'm concerned, that could quite possibly be the best decade for rock, ever.
JD's "Country Roads" is classic, I don't care who you ask. EJ's "Madmen Across the Water," I would consider a classic album.
For me, it was all about Jefferson Airplane/Starship (Dragonfly anyway, not so much the others that came after), Led Zepplin, The Who, Lynrd Skynerd(sp?), The Doors, Roxy Music, John McLaughlin, King Crimson, Deep Purple, Captain Beyond, Pink Floyd, Brian Eno, Mountain, Alice Cooper, Black Sabbath, T Rex, Atomic Rooster, The Bubble Puppy, Aerosmith, Angel, Blue Ouster Cult, Traffic, Spirit, XTC, Zappa, etc., etc., etc. I could go on but I don't feel like typing that much. Far too much to list here.
And an album was three bucks and change. Oh, and this is a big admission, but I like the Bee Gees of the pre-disco era. I couldn't say that out loud back then.