The Vengeful Hero: Mob bodyman Michael Sullivan Sr. (Tom Hanks), raised from childhood by his boss, Illinois gangster John Rooney (Paul Newman). Rooney likes Michael more than his flaky, angry son, Connor (Daniel Craig).
The Tragedy: After Sullivan's son Michael Jr. (Tyler Hoechlin) witnesses Connor take out his colleague Finn McGovern, Connor puts a hit on Michael Sr. and personally travels to the Sullivan family home to do away with Sullivan's wife Annie (Jennifer Jason Leigh) and sons Michael Jr. and Peter (Liam Aiken). Michael Jr. hides, surviving the bloodbath.
The Body Count: 9
The Final Hit: Hitman/crime scene photographer Harlen Maguire (Jude Law), tasked with assassinating Michael Sr. by Rooney (who by this point has been slain by Michael Sr., along with Connor), finally gets his man, fatally shooting (and then photographing) Michael Sr. at a relative's beach house on the shores of Lake Michigan. As Michael Sr. bleeds out, he kills Maguire with his own piece before dying in his son's arms, making Michael Sr. technically the final kill of the film (although Maguire was Michael Sr.'s final hit). The vengeful spree convinces Michael Jr. to never hold a gun again, which was always his father's hope for him.
...So, if you really think about it, this is the movie where Forrest Gump kills James Bond in cold blood.