Are  Jeff Mangum and Zack de la Rocha in the same industry?
Jeff Mangum Jeff Mangum (born October 24, 1970) is an American singer, songwriter, and multi-instrumentalist, best known for his work as the lyricist, vocalist and guitarist of the band Neutral Milk Hotel, as well as being one of the cofounders of The Elephant 6 Recording Company. He is best known for his complex, lyrically dense songwriting, apparent on the critically lauded album "In the Aeroplane Over the Sea".
John Doe (musician) John Nommensen Duchac (born February 25, 1953), known professionally as John Doe, is an American singer, songwriter, actor, poet, guitarist and bass player. Doe co-founded LA punk band X, of which he is still an active member. His musical performances and compositions span rock, punk, country and folk music genres. As an actor, he has dozens of television appearances and several movies to his credit, including the role of Jeff Parker in the television series "Roswell".