Rick Rubin(I)

Has produced albums for a diverse slew of artists including Jay-Z, Beastie Boys, Run-D.M.C., Slayer, Johnny Cash, System of a Down, Red Hot Chili Peppers, Nine Inch Nails, Slipknot, Macy Gray, Geto Boys, LL Cool J, The Black Crowes, Eagle Eye Cherry, Public Enemy, Audioslave, Limp Bizkit, The Mars Volta, Sir Mix A Lot, The Cult, Glenn Danzig, The Bangles, Mick Jagger, and T La Rock.

When they started, there was no such thing as heavy metal and it feels like the whole genre is based on 'Black Sabbath'. It may not always have sounded the same, and it's gone through a lot of changes, and there's a lot of really interesting metal that sounds like 'Black Sabbath'. But it feels like they were probably the first with the idea that this dark, heavy music could be the whole trip.