Among literary figures whose adventures have been translated to the screen, none have appeared as often as Sherlock Holmes. Arthur Conan Doyle’s pipe-smoking rationalist — the “consulting detective” with little patience for fools, a fondness for the violin, and a cocaine habit frowned upon by his friend, Dr. John H. Watson — has been seen on film since 1900. Basil Rathbone, Jeremy Brett, Benedict Cumberbatch, and Robert Downey Jr.: Every cinematic Holmes has his admirers, but only one of them is fit for a king.