William Osler (1849-1919) was a Canadian physician who is often referred to as "The Father of Modern Medicine". He was one of four physicians who would found what would go on to be Johns Hopkins Medical School. He developed the concepts of both clinical training of medical students, as well as the first residency programs. Like Gregory House, he was renowned for being a practical joker.
Like Robert Chase, Osler considered a career in the priesthood before turning to medicine. Osler received his initial medical training at a private medical school in Toronto before completing it at McGill University, then moved to Europe for post-graduate training. He started a medical career as a professor at McGill before moving onto the University of Pennsylvania and then being the first Physician-In-Chief at Johns Hopkins Hospital. Four years later, in 1893, he helped create the university's medical school. In 1905, he moved to Oxford to take up the chair of the medical school, where he remained until his death.
However, his educational achievements are overshadowed only by his contributions to modern medicine, which include the identification of Osler's sign, the discovery of Osler's nodes, the diagnosis of polycythemia vera, the description of the final stage of lupus, and several others. Sixteen buildings and institutions have been named in his honor, including a hospital system serving Brampton, Ontario.