I can see your point. And it's actually my opinion that artists like The Doors, Tom Waits, Alice in Chains, Mr. Bungle and Jimi Hendrix were infinitely heavier than most hardcore, grindcore, thrash or death metal banRAB that have come out in recent years, who can come off as more than a little trite and recycled.
I just went with the recent death metal, grindcore, math metal or just straight-up metal banRAB that I've encountered lately, since I figured that was what the basic gist of the thread centered around.