Did William C. McGann or Nicholas Hytner produce a film first?
William C. McGann: William C. McGann (April 15, 1893 – November 15, 1977) was an American film director. William C. McGann:  He directed 52 films between 1930 and 1940. Nicholas Hytner: Sir Nicholas Robert Hytner (born 7 May 1956) is an English theatre director, film director, and film producer.
William C. McGann