19. Sam Fisher
The sarcastic dad of special agents, Sam Fisher was all about getting the job done. He remained professional in every situation (only later in the series when he believes his daughter is dead does he use violent interrogation methods), and even had a friendly rapport with guards he captured, right before knocking them unconscious. The night vision goggles were cool, but the sense of right and wrong made Fisher special.
Iconic moment: "You won't get a medal for this, Fisher," explains his handler during an op the government will deny ever happened. "Medals don't help me sleep at night, Lambert," he replies.