Pinback

If you don't know who Pinback is, you should be ashamed. Really. This band has one of the coolest sounds around. The bass and guitar just kinda groove together into a sonic wave of sound. (That was a bit redundant...and repetitive...) Some people have kinda ragged that the vocals and lyrics are kinda boring and meaningless, respectively, but if you're listening for the lyrics and vocals, you're listening for the wrong reason. I dare someone to listen to "Penelope" and not walk away humming the breakdown...or just kinda stop and shake it with the baseline.

Check out these in studio acoustic tracks:
Pinback - Some Secret History
Pinback - Penelope
Pinback - Junior