Second favorite would have to be The Beatles, come on can anyone besided Floyd beat Sgt. Pepper and The White Album?

"Lucy in the Sky"
"With a Little Help From Your Friends"
"Its Getting Better"
"Ricky Racoon"
"While My Guitar Gently Weeps"
"Dear Prudence"

By no means is it Floyd, but it is good.
After that I like the Eagles and some early Sabbath