THE Bruce Dickinson?

Artistic license.

Christopher Walken portrays producer Bruce Dickinson (not to be confused with the Iron Maiden vocalist of the same name). Although Dickinson has produced many songs and albums for many different artists, he was not the actual producer of “(Don’t Fear) The Reaper.” The song was produced by David Lucas, Sandy Pearlman, and Murray Krugman. Bruce Dickinson was a mid-level manager at Columbia Records whose name appears on Blue Öyster Cult reissue CDs and a greatest hits compilation as the “reissue producer”. Lucas has claimed credit for being the one who suggested the addition of a cowbell to the track.