John Cale

He was the true mastermind behind the "miracle" of Velvet Underground. His solo career is excellent, featuring pop gems (Vintage Violence, Paris 1919) and complex works (Fear, but especially Music for a New Society). It’s worth noting that he is a musician of considerable caliber (he plays viola and piano exceptionally well and manages with bass, guitar, organ, celesta) and possesses a rather unique voice. Indeed, in certain cases, a 5 is unavoidable.