Dr. Jonathan Potts (1745-1781) Henry Benbridge (1743-1812)

The picture has something of this: portrait, people, man, wear, light, music, jacket, outfit, profile, neckwear, facial expression, outerwear, musician, menswear, model, side view, singer.
Perhaps it’s a painting of a man in a green coat with his arms crossed and his head turned to the side, with his right hand on his chest.