I believe it is the Idealists not the Rationals, which are the freest thinkers. My reason for this belief is although Rationals are very critical and easily see through hype and deception they always view everything through the "square prism of logic". And logic can prevent one from seeing illogical although probable things.
If anyone actually wants to discuss this I will gladly provide more background on my belief. Until then I don't want to needlessly spin my wheels.