Garth Ennis's run on Punisher is some of the best writing in recent comics.
My absolute favourite book is Frank Miller's The Dark Knight Returns. 

If you don't mind batman too much, The Long Halloween, a Geoff Loeb and Tim Sale collaboration is pretty great as well.

I also really liked Jeff Smith's Bone, which is nowhere near as dirty as it sounds.  It's a long fantasy-ish story with fantastic art.

Hope this helped a bit.