1) Realist 
• (n.) One who is pragmatic.
Prag'ma·tist noun One who is pragmatic. 
[n] - a person who takes a practical approach to problems
pragmatist 1. A person who takes a practical approach to problems and is concerned primarily with the success or failure of his or her actions. 2. A person who is oriented toward the success or failure of a particular line of action, thought, etc.; a practical person.
noun a person who takes a practical approach to problems and is concerned primarily with the success or failure of her actions
a person who is oriented toward the success or failure of a particular line of action, thought, etc.; a practical person. · an advocate or adherent of philosophical pragmatism.