Action: Mel Gibson in Lethal Weapon...he was perfect in that role
Comedy: Leslie Nielsen in Naked Gun, BRILLIANT
Sly Stallone: Rocky, Rocky 4, Creed and Copland. Voters confuse acting with "acting" and sadly it cost him awards.
Val Kilmer: Top Gun...any guy that I have ever known that was in the Navy and/or Air Force said that Kilmer basically acted like every fighter pilot they ever met...and Tombstone, my goodness, AMAZING job.
Michael Biehn: Terminator and/or Tombstone, again, he was sick!