I always thought this portrait was on point.
While at Fort de Joux he was described as:
5 feet two inches.
Very Black
wiry and lean
large, expressive eyes
full lips
a broad, uplifted nose
large teeth
and an equally long, pointed chin.
Your image seems to be close to that mark except for the nose.
Face to face profile, I think the one at Fort de Joux is probably the best and perhaps a little dramatized
There is also an image (side profile) of him done in 1798 by Pint Van Der Benjamin that shows him mounted on his horse and looking the small body size and protruding jaw.
You can view it in the book: The Haitian Journal of Lieutenant Howard, York Hussars, 1796-1798




