Rolling stone published the best album covers ever list in their November 14th, 1991 issue. Here's the top 5:
The Beatles - Sgt. Pepper's Lonely Hearts Club Band (1967)
Sex Pistols - Never Mind the Bollocks Here's the Sex Pistols (1977)
The Beatles - The Beatles [White Album] (1968)
The Rolling Stones - Sticky Fingers (1971)
The Rolling Stones - Exile on Main St. (1972)
What would you add to the list?