Agalloch is a criminally overlooked band. They are nothing like Opeth, just look at the liner notes to The Mantle and see how many instruments they use. Then listen to The Lodge, in which they actually bang on antlers with a stick. Another good example is A Desolation Song, which I think only uses an accordion and acoustic guitar, whose lyrics about sitting in a cabin and drinking are all whispered. Opeth has certainly never done anything like that. I'll admit it took me a while to get into the Mantle, but it was really rewarding. Some of the riffs seem pretty repetitive at first, but after a while that doesn't seem the case; you start to notice new things and the song takes on a newer light. I guess a lot of bands are like that though.