Steve Sailer has an intriguing article over at his site comparing the artists who sell posters years later versus those who get mentions in the art history texts. The latter list:
Pol de Limbourg
Antonio del Pollaiolo
Giorgio de Chirico
Hugo van der Goes
Okay, I recognize two of those. You can all probably guess who's on the popularity list, though. Sailer gives a very plausible explanation why the Impressionists and Expressionists do so well at poster-selling, but are cited less as important influences.