1 - Metallica - And Justice For All...
2 - Soundgarden - Badmotorfinger
3 - Audioslave - Audioslave
4 - Freezepop - Future Future Future Perfect
5 - Gillian Welch - Music from the Revelator Collection (Live)
6 - George Thorogood & the Destroyers - George Thorogood & the Destroyers
Probably not much use as a recommendation though as some of those are very obvious and some would have a very narrow appeal, but it's my list.
Metallica black album was a contender for me, yes yes I know, sell out album etc...