Nice list, Alex. Here's a paragraph from the Doyle bio link above:

The young medical student met a number of future authors who were also attending
the university, such as for instance James Barrie and Robert Louis Stevenson. But
the man who most impressed and influenced him, was without a doubt, one of his
teachers, Dr. Joseph Bell. The good doctor was a master at observation, logic,
deduction, and diagnosis. All these qualities were later to be found in the persona of
the celebrated detective Sherlock Holmes.