canterberry tales, pick someone that would represent the doctor

The character in Canterbury Tales I got was the doctor. I think that any person could be him. Any person could wish poor health on someone else for any reason whatsoever. They could be an enemy, a colleague, a fellow student, or someone that wants a relative to die so that they can get money, a house, or a piece of something, for example a company. The doctor wants everyone to get sick because of plague so that he can heal...