I always dug Tom Morello back in his hardcore (see: first two Rage Albums) Some of his solo work, while not long winded and difficult from a playing stand point, fit the music perfect. "Freedom" off their first Album is a good example.
Rage Against the Machine, their political mumbo-jumbo aside, could really capture a feeling with their songs. While some think they're garbage I think those first two albums were beyond great. After that I was done with them because that whole "I'm pissed" can only go so far. They were not very dynamic, but the one thing they knew how to do they did it great.