Johannes Vermeer
Johannes Vermeer was a Human painter on Earth in the 17th century.
He created the paintings A Woman Holding a Balance, of which Data kept a replica in his quarters aboard the USS Enterprise-D, (TNG: "The Game", "A Matter Of Time", "Hero Worship", "The Outcast", "The Quality of Life", "Birthright, Part I", "Descent", "Phantasms", "Inheritance", "Masks", "Genesis") and The Concert, which was one of the war trophies in the Nazi headquarters in Sainte Claire, and which was owned by Pelia by the 23rd century. (VOY: "The Killing Game"; SNW: "Tomorrow and Tomorrow and Tomorrow")
This character was only mentioned in dialogue.