Can anger ever be virtuous (see details)?

This is a major dispute between Aristotle and the Stoics. The Stoics say that anger always indicates a deficiency in one’s character, while Aristotle says that it would be a mark of bad character not to get angry in certain situations.

There is room in the logical space between these views for other positions, of course, but I’m mostly interested in your thoughts on the dispute between Aristotle and the Stoics. Arguments for each side are available upon request.