Lots of band have created very interesting lyrics (of course it's related with their music). I'm more into Dave Mustaine's lyrics (Megadeth) and Tracy Chapman (pop artist from USA).
I know you dont know them, but the lyrics that touch me most are from Hermética and Almafuerte (bands from Argentina, Ricardo Iorio is the writer of both and he write in spanish).
Im not a big fan of punk music, although I enjoy some bands, Bad Religion probably being my favorite punk band, I've gotta give props to them for some absolutly amazing lyrics! Greg Graffin(spelling?) is fantastic.