Anton Chigurh.

Anton Chigurh, the character in the film No Country for Old Men, mainly uses a captive bolt pistol with an air tank, a Remington 11-87 shotgun with a silencer, and a silenced TEC-9 pistol.

Anton Chigurh is defined by the directors (the Coen brothers) as the embodiment of pure evil and relentless fate. He is not an ordinary psychopath; he operates under a twisted philosophical logic that makes him a destructive force of nature.

Strict moral code: Although he is a ruthless killer, he lives by a set of unbreakable rules. He doesn't kill for pleasure, sadism, or money (he leaves large sums of cash behind if they aren't part of his "deal"). He keeps his word no matter what.