I don't care much for those bands you posted, OP, but I do like the occassional Slipknot song. There's an Industrial band called Mushroomhead that I like.
How about Agalloch? They're a mix of post-rock, folk metal, black metal and doom metal. The singer sometimes performs black metal vocals with an acoustic, folk-ish guitar in the background.
The first song I ever heard by them was Limbs:http://www.youtube.com/watch?v=SIzoyPfPKO4
The first few seconds are very high-pitched, but it turns into the most beautiful piece of music you'll ever hear, even if you were a Grindcore fan you would still like it.
Hope you like them!