Can't believe nobody has suggested Radiohead's "The Bends" yet!!! Amazing album, they went shit after that though, I don't care how many people say OK Computer was good, it wasn't!
Also, Chemical Brothers "Dig Your Own Hole" pretty much went under the radar for most, but I reckon listened to end to end in it's entirety it's their best album by far.
Recently got into Wolfmother, check out their self titled first album or thee follow up, "cosmic egg" if you were ever into Led Zeppelin...
Mylo's "Destroy Rock and Roll" may seem quite mainstream to many, but in the early noughties his genre defining blend of pop, disco and house was truly awesome!
Red Hot Chilli Peppers "Blood Sugar Sex Magic"... Need I say more?
Oh, and for those above into Trentemoller, if you can, check out his Essential mix from a few years ago. Quite possible I've still got it as an mp3 if anyone wants a copy. 2 hours of absolute genius from the man!
Goldie "Timeless"... Most groundbreaking dance music album of the 90's, if not ever. Showed the guy for the genius he is.
And that's just a few I can think of right now, will undoubtedly have tonnes more when I switch my laptop on when I get home!