i don't know about the best but here are some i strongly like.
Pink Floyd - Piper At The Gates Of Dawn
Led Zeppelin - IV
The Doors - Self Titled
The Clash - London Calling
The Misfits - Famous Monsters (hate to admit it)
The Beatles - The Magical Mystery Tour & White Album
Black Sabbath - Paranoid
The Strokes - Is This It
hmm, long message.