What is a person the opposite of drama queen?

Drama queen is a phrase that is used to describe someone who is overly dramatic or emotional. The opposite of a drama queen would be someone who is calm and composed, even in stressful situations. They would be able to think clearly and rationally, and they would not be prone to overreacting. They would also be able to listen to others without getting defensive or emotional, and they would be able to see the world in a more objective way.