Joanna Newsome, Regina Spektor and anything with boogie-woogie piano.
Since most of the debating is about not liking popular and/or revered artists, my pick in that category would be Paul Simon (solo albums only). His solo stuff has always rubbed me the wrong way. I've got a couple of friends who feel the same way about Steely Dan, who I happen to like a lot. It just goes to show how different that we can be sometimes, which I find interesting.