An unrealistic or impractical visionary.
Someone whose conduct stems from idealism rather than from practicality.
One who adheres to idealism.
An adherent of the realism movement; an artist who seeks to portray real everyday life accurately.
An advocate of realism; one who believes that matter, objects etc. have real existence beyond our perception of them.
One who believes in seeing things the way they really are, as opposed to how they would like them to be.