I suspect ACD's opinion on it being literary or not might be an ur-example for a significant number of the conversations we have about genre fiction and whether anyone who writes that can be considered anything above a hack, especially if they write romance.

Holmes definitely has many varied interpretations, whether as himself or as, say, Herlock Sholmes when the narration is in the hands of Arsène Lupin, greatest thief ever. So yeah, I can see where he's one of the original media fandoms.