Forget Peter Jackson, Rankin/Bass Made The Funkiest Orcs.

The above is from Rankin-Bass's (the awesome cartoon company that produced the old claymation "Rudolph" specials, The Last Unicorn, and Thundercats) version of Return Of The King, and boy... that is some funky wah-wah goin on with that guitar. In the animated version of this and The Hobbit, they did a great job of replicating the songs that are sprinkled throughout the books. Speaking of things that were much cooler in the animated version than the live-action one, here is the scene where they break down the gate with the giant battering ram.