Tim Minchin, Adam hills.
List pretty much ends there. (With the exception of Demetri Martin, but that is a given)
Tim Minchins musical comedy is some of the best music bost lyrically and melodically I have ever heard. "If you really loved me.... the way you say you do... yuo would take a dreary day and you would paint it blue, if you loved me unconditionally.... you'd let me video you while you wee... standing up in the bath. I shouldn't even have to ask. And maybe you could store a little more in a flask...."