Gregory Peck's role in 12 O'Clock High is also a good example of effective management.
Leadership, on the other hand is much over-rated.
Only if one believes in the mission above all else, including personal sanity. That's a pretty doubled edged example, there, Mr. Conspiracy! (Which is why it's a great story and film.) And I think most people would rate it as leadership first, management second. It's the General above Savage who is doing the managing.