423. Nico

Far more than just the Andy Warhol endorsed ingénue who collaborated with the Velvet Underground, Nico had a very successful solo career of her own which helped push the boundaries of Experimental Rock and proved to be quite the musician in her own right. As she did not get in with the Velvets, it is probably unlikely that she will ever get into the Hall on her own, but she may deserve at least a look.