Storm Thorgerson is a living legend when it comes to album covers. He did Pink Floyd's but you can also find his name on records by Led Zeppelin, Peter Gabriel, Phish, Muse... and so on.
For the person interested in album cover art there's now a book titled Taken by Storm - album art by Storm Thorgerson. Click the pic or this link to get to the BBC page to read more and watch a short clip with Storm.
Oh! And by the way. If you want to read up on the man who invented record album art (Alex Steinweiss back in 1938) you can go here, here or here. Lots of record covers to enjoy!