"You Can't Do Me" - The Scottsboro Boys
"Leave" - Once
"Zombie" - Fela!
"Work the Wound" - Passing Strange
(all songs more complex than just anger, but if you can channel just the anger they are tremendous for this thread's purpose, especially the latter two.)
I'll also double votes for "Funny" from City of Angels (seething, sarcastic anger, that one) and, of course, Sweeney's "Epiphany" (the most frightening three minutes in Broadway history.)
Lastly, I'd like to negate someone else's prior vote for "I Resolve" from She Loves Me. There isn't an ounce of anger in that show; it's entirely sugar. Deliciously sugar, but completely and utterly sugar (and not a trace of anger.)
Words don't deserve that kind of malarkey. They're innocent, neutral, precise, standing for this, describing that, meaning the other, so if you look after them you can build bridges across incomprehension and chaos. But when they get their corners knocked off, they're no good anymore…I don't think writers are sacred, but words are. They deserve respect. If you get the right ones in the right order, you can nudge the world a little.