Really never heard of him? Solo artist and also produced people like ... well this is directly from wiki
Other notable production credits include Halfnelson (first incarnation of Sparks), New York Dolls, Badfinger, Grand Funk Railroad, Hall & Oates, Ian and Sylvia (on their "Great Speckled Bird" album), Meat Loaf, Patti Smith, Shaun Cassidy, The Tubes, Tom Robinson Band, XTC, Bad Religion, John Sloman, Cheap Trick, Hello People, Hiroshi Takano, Bourgeois Tagg, Dragon (aka Hunter), 12 Rods, The Pursuit of Happiness, The Psychedelic Furs, Steve Hillage, The American Dream, and many others.