Hell yeah Sebastian Moran
Out of context this could probably be easily misinterpreted. 

Out of context this could probably be easily misinterpreted. 

The File on Colonel Moran - Volume One: The Lure of Moriarty by Vernon Mealor.
A good portrayal of Moran, who initially gets the better of Moriarty before he ends up in his employment. 

The File on Colonel Moran - Volume One: The Lure of Moriarty by Vernon Mealor.

A good portrayal of Moran, who initially gets the better of Moriarty before he ends up in his employment. 

Fanfiction (Moriarty/Moran)

Title: A Most Intimate Experiment
Author: KoreArabin
Characters/Pairing: Sebastian Moran/James Moriarty
Verse: Ritchie!verse
Rating: Adult
Warnings/Contents: explicit sexual content, D/s
Summary:  Professor Moriarty proposes an experiment

Part 1
Part 2
Part 3 

Sebastian Moran in Silver Blaze and Sherlock Holmes: A Game of Shadows.

Sebastian Moran in Silver Blaze and Sherlock Holmes: A Game of Shadows.

by いしかわ on Pixiv

by いしかわ on Pixiv

This is either still a WIP or in the ‘forever unfinished’ category, I’m not sure which.
(Background screencapped from AGoS; the rest was airbrushed/drawn.)

This is either still a WIP or in the ‘forever unfinished’ category, I’m not sure which.

(Background screencapped from AGoS; the rest was airbrushed/drawn.)

Quotation from The Adventure of the Empty House.

Quotation from The Adventure of the Empty House.

Moran was a skilled gambler who only rarely lost, a fact which, to any knowledgeable student of human nature and the ways of the world, means one thing only - that he was a cheat.
Indeed, Moran was a professional cheat, a sharper of more than ordinary dimensions - a macer, in criminal parlance. Second only to shooting, he had made card sharping a life’s work

from The Return of Moriarty by John Gardner.

(Moran is portrayed very badly in this story but there are a few interesting lines about him.)