When you think of Sherlock Holmes, romance might not be the first thing that comes to mind. (Unless you were in the Johnlock trenches back when BBC’s Sherlock was airing. In that case, we see you.)
The famous fictional detective, based on Sir Arthur Conan Doyle’s books, prefers mysteries over matters of the heart. He never marries in the source material — but modern adaptations have occasionally given him brief romances.