John C. McGinley (Then)
Playing the Chief of Medicine and J.D’s reluctant father-figure and mentor, Perry Cox’s most dominant trait is his brutal sarcasm. Despite his harsh exterior, Cox showed moments of empathy and was especially close with Carla and his ex-wife Jordan. Before “Scrubs,” McGinley appeared as Sgt. O’Neill in “Platoon,” Danny Kriezel in “Fraiser” and provided voices for “King of the Hill,” “Spider-Man” and “Justice League: Unlimited.”