Our second doctor can legitimately lay claim to having once been an actual medical doctor but as his areas of interest have changed I'm going to assume he has allowed his medical practise to lapse.
Although Strahd Von Zarovich is certainly Ravenloft's most iconic personality a close second and in many ways the P.O.V. character for much of the background in the original Ravenloft campaign setting is Doctor Rudolph van Richten. For those of you not familiar with Ravenloft van Richten is basically D&Ds version of Van Helsing from Dracula.
There was previously a van Richten figure in one of the D&D pre-painted miniature sets but to be honest he seemed a bit off the mark. He was a bit too action-hero in his pose for an older man and also had a cape that was proportioned like Nibbler's cape from Futurama. This new figure (by Gale Force 9) combines some features that make van Richten look his age while also updating his clothes to fit with the current D&D/Pathfinder aesthetic of layered leathers and adventuring gear.
I'm really a big fan of this figure not only for his intended purpose but again much like my updated Professor Vitale model it gives me another reasonable looking figure for a wizard who doesn't simply look like he wears his Gandalf cosplay to go adventuring.