Flight Lieutenant George Frederick "Buzz" Beurling, Canada's highest scoring pilot of WW II 31.3 kills, including 27(!) in just 14 days.
There have been a couple of great books regarding Beurling, he was truly one of the most lethal fighter pilots of all time. He spent most of his time perfecting his shooting skills while on the ground by shooting at strange angles with pistols and rifles etc. He had a very unorthodox way of calculating lead and angles for shooting, it is described in one of the books, and one of the only people he ever sat down and explained it to was his squadron XO while in Malta. Within 3 days this XO went from never hitting an enemy to killing 4 109s, and went on to make ace. Beurling used to remove the .303's from his planes and shoot only the 20mm, and there were kills where he said he had aimed for the Italian pilot's head, and hit it with a 5 shot burst from the ol hispanos, proved by gun film and by said pilot being sans head when they found the wreck.
He was also absolutely CRAZY. If you get a chance, track down his books, I can't recall what one title was, but the best book is called "Malta Spitfire", and it is excellent. Edit: The other book is called "Hero: The Buzz Beurling Story".
Also, as an aside, my Pipe Band was part and parcel to the Seaforth Highlanders back in the day, and our cap badge is still the Stag that the Seaforths wore. Great video!