Danielle Dax or Nina Hagen
I'd pick Danielle. Truly original with an amazing voice and a knack for making wonderful melodies with the use of household items. Nina is way over the top and released one difficultly brilliant album NunSexMonkRock. She then tapped into the dance funk thing and got lost, though her undeniable bizarreness keeps her from ever being a mainstream diva. I love to watch her insanity. She's quite a character.