Again with the Killswitch, my fave album is the End of Heartache. I just fricking love the tone! Another not-so-well known tone monster in my book would be Mark Mynette from Kill 2 This. Listen to the albums Deviate and Trinity, the guy has some awesome crunchy tone going on.
Another couple of bands I'm into at the moment tone-wise would be DevilDriver and Divine Heresy. They are going to be on the more brutal metal end of things so you might not like the vocals (Although the singer from Divine Heresy has an amazing singing voice when he uses it occasionally on the album, try "Failed Creation") but the Guitar tones are pretty good.
I'm very pleased to see some bands coming out of the scooped mids trend that's been going for a while, a lot of the newer guitarists really are going for a nicer sound. My personal fave kind of tone to play with in my band, I usually roll the gain back to just over half-way, have the Bass up 75%, the mid up about 60% and the treble up about 90% with the presence up around 90% too. Gives some nice cut at the top but also a really nice throaty crunch with the mids and the Nailbombs doing their thing with the gain.
