Tom Waits - the man, the myth, the legend. It's kind of similar to the way I view Dylan - you can dislike the voice or particular periods of their career, but you just can't ignore the songs. And both are master craftsmen in that category. Looking back over Waits' body of work, it seems that he sticks with a certain sound for about 3 albums, then moves on to something new. And that ain't easy to do while still maintaining the high quality of tunes.