As a tribute the medical professionals out there risking their lives right now the theme is Medical personnel in SF&F. Doctors, nurses, EMTs and others Standard av rules apply: 200 x 200 pixels max, 1 MB max and they must be work/Google safe. You may enter up to three avatars.
Going with the all "F" theme. Diagnostician Tocot-Farscape Doctor Simon Tam-Firefly Doctor John Zoidberg-Futurama
Doctor Leonard H. McCoy from Star Trek: Doctor Zachary Smith from Lost in Space: Doctor Claire Finn from the Orville:
#1 Dr Evil, MD (Austin Powers) #2 Nurse Alex Price (An American Werewolf in London) The third one, I'm not sure he qualifies. He has no medical title, but only because they didn't exist in his age, but he is shown to be a healer. So, trying my luck here: #3 Akiro the Wizard (Conan the Barbarian)
Was Dr. Smith a medical doctor? I'd always assumed he was kind of scientist or something along those lines.