Potential ideas:
The Hacker, The Pirate, The Vigilante, The Mercenary, The Punisher, The Assassin, The Politician, The Chef, The Merchant, The Traveler, The Chemist, The Samurai (Sengoku Period), The Serial Killer (any crime-drama series), The Deceiver, The Ghost (literally or figuratively), The Reporter, The Lawyer, The Thief and The Philanthropist.