Sebastian Moran
From Tardis Wiki, the free Doctor Who reference
Colonel Sebastian Moran was one of the few individuals who knew that Sherlock Holmes was still alive in 1893. (AUDIO: The Adventure of the Diogenes Damsel)
In the City of the Saved, Remakes of Sherlock Holmes and John Watson encountered a thin man with a pointed beard who they thought resembled Moran. (PROSE: Eliminating the Impossible)