I think this speech from the first season episode of M*A*S*H, “Sometimes You Hear the Bullet” was Henry Blake’s finest moment:

“I don’t know. If I had the answer, I’d be at the Mayo Clinic. Does this place look like the Mayo Clinic? Look, all I know is what they taught me at command school. There are certain rules about a war. And rule number one is young men die. And rule number two is, doctors can’t change rule number one.” McLean Stevenson as Lt. Colonel Henry Blake on M*A*S*H