William Pouter

Presumably brother (or at least related) to Daniellarina Pouter, William is a painter and portraitist of at least some note. His portrait of Vetinari and Wuffles entitled Man With Dog was hung in the Royal Art Museum in Ankh-Morpork before being stolen on behalf of Cosmo Lavish during or just before the events of Making Money.

Annotation

Pehaps another take (somewhere there is also a portrait entitled Woman with Ferret) of Leonardo da Vinci's Woman with Ermine?