John Carradine played him in a 1940 film also starring Gene Tierney and Henry Fonda which was directed by Fritz Lang.  
Lesser known portrayals of this character include John Ireland playing him opposite Tom Tyler and Reed Hadley in a 1949 Samuel Fuller film.  John Carradine played him in a 1940 film also starring Gene Tierney and Henry Fonda which was directed by Fritz Lang.  A song with this man in the title begins with the lyrics "Like a corn in a field I cut you down."  That song was released as a single paired with "Grow Some Funk of Your Own," and is an Elton John song titled "I Feel like a Bullet In the Gun of" this man.  In a recent movie, his brother is played by Sam Rockwell, and his portrayal earned an Oscar nomination for Casey Affleck.  FTP, name this "coward" in a 2007 film about his assassination of Jesse James.
Lesser known portrayals of this character include John Ireland playing him opposite Tom Tyler and Reed Hadley in a 1949 Samuel Fuller film.  
Robert (or Bob) {Ford}