Meh
Always loved "White Rabbit" by Jefferson Airplane, but a full album just didn't measure up. Liked Grace Slick though.
Pink Floyd? Not sure. Possibly Dark Side of The Moon.
As I said, it's very subjective. As I see it, popular music almost always reflects its place and time, and the tastes/feelings/world view of a specific demographic . I was especially receptive to new sounds from when I was 16 to age 20 (conscripted June 67, didn't hear all that much music fora couple of years) I missed an awful lot of stuff from late 1967 to mid 1970. There were some exceptions, such as Jimi Hendrix, Janis Joplin, Procol Harum, Yardbirds, (with Eric Clapton) and The Small Faces. Thought Steve Marriott was amazing. Plus Beach Boys Of course. I've gone off them over the last few years, same with The Four Seasons.
In latter years, I pretty much forgot about pop music, and focused on Jazz and Blues. The last decade or so I discovered old style country music, going back to The Carter Family. Even though much later, still love Iris Dement, in that 'authentic' style.
"Let The Mystery Be"
As odd as this may seem, it's my opinion that ABBA was/is the most perfect rock group in the history of pop music, whose members wrote the most perfect pop music ever written.
