Syd Barrett, co-founder and main braintrust of Pink Floyd until his mental state made his departure inevitable, was without doubt one of the greatest, most original musicians of his time. Until being ousted from the band, he contributed the vast majority of the material.
Embarking on a solo career, Barrett composed and performed a wealth of brilliant, if patchwork, songs. Flashes of his genius abounded, but his increasingly erratic behavior made production quite challenging, indeed. Syd released 2 albums worth of material, then retired to private life for the rest of his days.