I freaking LOVE Rise Against. Sure, I don't agree with all of their songs, but the lyrics are just so powerful. And not ALL of their songs are really political, some are about conservation ("Ready to Fall" (That's quoted in my location!) and "The Good Left Undone") and other songs like "Injection" and "Survive".

I also like Green Day somewhat (even though they aren't THAT political), and some of System of a Down's songs are okay, don't care for them much though.