James Cagney and Darth Vader

What a great trivia advertisement this is. The ad for the 2003 Nissan Frontier, the truck going through its paces, as a host of TV and movie greats say tough things in the background. I am listing the actors, in order, as I believe who they are. I can’t come up with number 7, so I would like that filled in, and also answer me if I am correct as to my choices.

  1. James Colburn
    2.R. Lee Ermey (Marine drill Sgt.)
    3.James Cagney
  2. ???
  3. Sam Kineson (comedian)
  4. R. Lee Ermey
  5. John Bulushi (from Animal House)
  6. Darth Vader
  7. R. Lee Ermey

Sorry,can’t come up with number 4.