Acapella / instrumental covers for DND ideas...

So, the easiest way to explain my request is to ask "have you played Bioshock Infinite?" If not, you might look up the Fortunate Son or After You've Been Gone covers on youtube. That's basically what I want to emulate in a DnD campaign.

So, what I am looking for is more stuff like that! Smooth McGroove, Pentatonix, Peter Hollens, Vitamin String Quartet, original modern songs which could be turned into plot hooks, character ideas, settings... very heavy music theme in game.

Also it's good listenin'. Thanks guys! Already got a lot of good ideas in the cc before I posted this, too.