I recently saw Casablanca for the first time in my life and I really enjoyed it, and while Rick doesn’t exactly fit this narrator’s thesis about not having vulnerabilities (because he did; heart break, cynicism and alcohol), he was definitely a cool customer, decisive and willing to take action, and would hold his cards close to his vest. IE: he didn’t spend the whole movie broken and whining about it.
Humphry Bogart was excellent in everything he did. Just a great actor. Currently, Dennis Quaid is at that level.