If I had to live the rest of my life, with only the albums of one group to listen to, it would be Pink Floyd. You didn't mention individual Artists, or I might pick Bowie overall... close call.
I could listen to Floyd over and over, but I can't say the same about The Beatles. Once I've listened to one of their entire albums, I don't want to hear it again for a while. That goes for Stones, Zeppelin and most others, too. I could listen to most of Bowie's concept albums over and over, though. Ziggy Stardust and Diamond Dogs in particular.