This is really hard, because I feel like no matter what I post, you've heard it before. And AiC is grunge bordering on metal to me, Tool is some unique category. But yeah, Black Sabbath (Vol 4-Sabotage), Rush, Rainbow, Hendrix. Whoever said Rush didn't sound dated.. I kinda got a laugh out of that, but they're kind of a mix. Some doesn't sound dated, some albums sound right out of whatever year they came from, stamped with 70s/80s all over them. And I keep on trying to get people to like Bruce Dickinson's album Skunkworks. Very rock-y, not metal-y. I recommend that for everyone ever, unless they're stupid.