1967 gives us The Piper at the Gates of Dawn. This was a milestone of a different sort from The Velvet Underground & Nico. Probably the first genuinely ‘Psychedelic’ album, this is a strange mix of Cambridge whimsy and trippy, spacy music that became the Floyd’s trademark as time went on. The quirky stuff came from the weird imaginings of Syd Barrett (allegedly inspired by rather too much LSD, which eventually did for him as a viable personality – died 2006) and you can make of them what you will.
The ‘Barrett-less’ Floyd (he was ejected after the second album because of his seriously erratic behaviour) went on to become a hugely successful band.