Final answer:
Stanley Milgram would most support the claim about identity shifts due to power dynamics and obedience among medical students, as his research extensively dealt with obedience to authority.
Step-by-step explanation:
The individual who would most support the claim that identity shifts in medical students are attributed to power dynamics between them and physicians, and that they learn professionalism through obediently following orders, is B. Stanley Milgram. Milgram's famous experiment in 1962 evidenced that people are overwhelmingly willing to perform acts against their own consciences when directed by someone in a position of authority. This conclusion is further supported by replication studies such as those by Burger (2009) and Doliński et al. (2017) across different cultures and contexts, maintaining consistent results with Milgram's findings on obedience to authority.