If you're into the clean/death vocal dynamic, then Opeth is pretty much your go to band. Seeing them live can be an interesting experience. Stuck with a song you don't like, you have at least ten minutes to sit through. Get a favourite though, and you will be sucked away to an almost timeless place, where sweet riffage and folk imagery is all that counts.
Sure, maybe this sounds like classic metalhead fare (whoaa dude, heavvyyyyy) but, you know what, fuck ya.