Rock

I've got lots of stuff from the 80's and need to expand. I've always liked The Police, Genesis, Peter Gabriel, Yes, and Joe Jackson. But I need to get back to the 60's and 70's. I've recently started collecting all of The Beatles, and that's been nice. Most recent acquisition is A Hard Day's Night. I'm collecting chronologically and looking forward to the next discs.

What albums or groups should I add to my collection?