Rolling stone published the best album covers ever list in their November 14th, 1991 issue.  Here's the top 5:

1. The Beatles - Sgt. Pepper's Lonely Hearts Club Band (1967)

2. Sex Pistols - Never Mind the Bollocks Here's the Sex Pistols (1977)

3. The Beatles - The Beatles [White Album] (1968)

4. The Rolling Stones - Sticky Fingers (1971)

5. The Rolling Stones - Exile on Main St. (1972)

What would you add to the list?