I just finished reading
Boyd: the Fighter Pilot Who Changed the Art of War. I can't recommend it enough.
As a Captain at the USAF Fighter Weapons School, wrote the Aerial Attach Study that became the first and official tactics manual for the USAF.
He developed the Energy-Maneuverability theory of aerial combat. His theory and personal drive was heavily influential. He was the head of the "fighter mafia" that forced the F-16 on the Air Force. Developed the OODA loop theory. His theories on maneuver warfare were heavily influential on the 1991 Gulf War.
There is pretty good evidence that he actually developed the left hook plan in his weekly meetings with SECDEF Cheney.
He was a polarizing figure who advocated for small, lightweight, maneuverable elements.