Dr. Phil-a psychologist, not a psychiatrist. He lost his license in TX for allegedly having sex with a patient and then hiring her as an employee.
Harley Quinn, the most unrealistic presentation of a psychiatrist I've ever seen. Someone who is an attending psychiatrist is likely bright, out of shape, not a spring chicken, and if anything, likely have some very geeky/nerd qualities.
What we have in HQ is someone who is young, in-shape, and ditzy. She fell in love with the Joker immediately upon analyzing him. You'd expect this behavior more out of someone with an abusive childhood, poor education, low self-esteem, and strong antisocial and borderline traits.