According to Aristotle, "the tragic hero evokes both our pity and terror because he is neither good nor thoroughly bad but a mixture of both; this tragic effect will be stronger if the hero is better than we are. Such a hero suffers from a change of happiness to misery because of his mistaken choice which is led by his hamarcia (error of judgment). The tragic hero stands against his fate or the gods to demonstrate his power of free will. He wants to be the master of his own fate. He decides to make decisions but mostly the decision making would lead to weakness or his own downfall."
Now according to Aristotle's definition of a "tragic hero" it is time to elaborate on the clues in details in order to conclude that Dr. Faustus can also be a tragic hero according to following reasons:
Firstly because Dr. Faustus as a tragic hero evokes our pity. We feel some form of connection with him because he has a sense of realism. Dr. Faustus makes mistakes which can be also all human condition. He wants to gain more knowledge that is also another part of human condition to learn and understand more. We sympathize with Dr. Faustus because his feelings are similar to other human beings at the end we really want him to repent in order to change his fate radically. We sympathize with him at the end of the drama when it is time for a farewell to his soul. Although he has done many faults but we really want God not to be so fierce towards a human being. He desires:
O soul, be changed to