Forget the hair, that's a hopeless cause. Just keeping his shirt tucked in would be a full time job. This is one reason I don't like fanfics in which he's an academy graduate. He wouldn't have made it past "beast" which is what they call Basic Cadet Training the summer before their freshman year. It's a toss up whether he'd have been sent home for insubordination, failure to wear the uniform properly, or would have left in disgust voluntarily.
But then, there's a lot of fanfic out there that mischaracterizes him a lot worse than that...like making him suicidal for example. Anyone who mentions wanting children and grandchildren as much as he does cannot possibly have a death wish. Sheeesh.