The doctor who invented (discovered) insulin, although his name escapes me.

As noted above, Banting was one of the guys. The co-worker/discoverer was Best who'd been born in the US but became a Canuck. (Macleod and Collip were important to the discovery also.) Both B and B fought in Canada's army in WWI. Banting was awarded a medal for braverey because he continued to treat wounded soldiers when he himself was wounded.

"Charles Herbert Best was born in Maine, the son of a physician. He joined the Canadian artillery during World War I, and thus qualified for Canadian citizenship.

Best was still a medical student at the University of Toronto when he joined Frederick Banting in his work to isolate the pancreatic hormone insulin and apply it to the treatment of diabetes. The work had personal significance for Best, as his favorite aunt had recently died of the disease. He finished his medical degree in 1925, two years after Banting and physiology professor J.J. Macleod received the Nobel Prize for the work. Banting, who felt that Best should have been recognized by the Nobel Prize committee as well, gave half of his monetary award to Best. Macleod then shared his with J.B. Collip, the chemist who had worked with them to purify insulin for clinical trials."