The thinking man's Punisher?
Guy seeks revenge against gangsters who killed his wife and child and left him for dead. Guy is a one-man killing machine adept at guns, explosives and a penchant for killing his enemies in elaborate ways.
If they ever make a movie about Mack Bolan (aka The Executioner, the original inspiration for The Punisher) they could do worse than consider Farrell. He even vaguely looks like Mack Bolan from those old paperbacks...