You believe that it was necessary for him to be a dick in the pursuit of genius; I think the outcome of his "full manifestation of the self" meant that society benefited from 10 years of his singular effort and then lost out on the next 50 years because no one would work with him, and his peers actually laughed at him for his (entirely wrong) approach to the theory of what light is. Boyle and Hooke accused him of stealing their ideas on optics.
The fact Newton was an asshole, and people let him be an asshole, robbed us all of 80% of what he might have achieved if he'd been a bit nicer.