I would call them "realists". Rhett Butler saw the world the way that it was, with as little emotion as possible. The clip below shows this. Soros wold have call this reflexivity and the ability to see what world as it really is in an epistomological sense. I would throw Warren Buffett into this mindset as well.
What is true? What is real? When it comes to investing and your surrounding you should strive for the same thing at all times.