earlier studio albums: Led Zeppelin. Love those first 4 records. The Beatles' first four "Beatlemania" albums were amazing for their time but better albums were to follow. Mid to later studio albums: Zep started going slowly downhill after "Physical Graffiti", even though PG is phenominal and the following albums were great. The Beatles, as far as I'm concerned, continued to climb the Ladder of greatness with each album and peaking with Abbey Road.