The Consigliere
Tom Hagen
(Robert Duvall from The Godfather)
Manpower, guts and ability to handle (and dodge) firearms are all very well, but a Family can't function without someone selflessly ducking the gunplay and making sure all the actual business goes on as smoothly as possible. Enter the Consigliere, or Counsellor.
Hagen, an orphan and decidedly the finest thing young Sonny Corleone ever brought home, is an indispensable and completely trustworthy member of the Family. While he might not exactly be best suited to wartime, he's seen his share of the high stakes, never betrayed any cowardice, and doesn't blink an eye while making offers Hollywood producers ought best not refuse.