Roger Dean is an illustrator most often associated with Yes. He's the guy responsible for their logo.
Before hooking up with that band and designing about nine of their covers, he did this cover in 1971.
Osibisa (Decca 1971)
This was the first of his covers to be so elaborate. It caught the eye of the Yes camp and the rest is, as they say, history.
Osibisa is made up African and Caribbean musicians. Very worldly. Still sounds contemporary. Think Afropop/Reggae fusion with hot lead guitar.