Agent Galahad (Kingsman): In one of the best action scenes ever, super spy Galahad kills a church full of homophobic & racist religious extremists.

GI robot (Creature Commandos): A robot designed to kill nazis in WW2 murders a gathering of neo-nazis after seeing the flag

B.J Blazkowicz (Wolfenstein): Protagonist of the Wolfenstein shooter games, where you play as someone who shoots down a bunch of Nazis in an alternate timeline where the Axis Powers have access to sci-fi and supernatural technology.

Captain America (Captain America: The First Avenger): there's a brief montage in the first Cap film of him & the Howling Commandos on the warpath