I want to make a bold proposition: the polar opposite of the autistic is the sociopath.
The autistic is internally chaotic and thus attempts to order the world–we seek order and seek to create order. That’s why young autistics in particular love to line things up (or make lists, as I did, which is really the same thing). It’s why we love structure in our lives and prefer for things to be predictable. Chaos added to chaos is just too much.
The sociopath is internally overly-ordered and thus attempts to bring chaos to the world–they seek chaos and seek to create chaos. They are extreme risk-takers and thrill-seekers. In its healthiest forms, they may climb mountains; in its unhealthiest forms, they may be serial killers. (Of course, not all thrill-seekers are sociopaths, though we do know that thrill-seekers do need more stimulation than does the average person.)
Each is seeking to balance order and disorder, as all of nature, from the level of quantum physics up through living things, human psychology, and human societies, does. When the internal world isn’t both ordered and disordered simultaneously, but is imbalanced in one direction or the other, balance in the external world is sought.
We do not have the sociopathic equivalent of the severe autistic because while too much chaos can make one unresponsive, too much order won’t have the same effect.
If my thesis is true, the sociopathic brain should be dominated by negative feedback (too much glutamine, too few synapses, etc.) and thus need stimulation (challenges). Challenges require strategies, so we should expect sociopathic people to be more strategic. We would also expect them to be more “social” and more outgoing and charming as a result. As a result, sociopaths both tend to be attracted to positions of power, and people tend to reward them by giving them power. You will find an extremely high percentage of politicians and CEOs to be sociopaths (though sociopathic CEOs also tend to be the least effective because of their tendency to take risks and not actually care about anyone else).
The autistic brain seems to be dominated by positive feedback (too much glutamate, too many synapses, etc.) and thus need a more calming atmosphere (which is why challenges can frustrate autistics). Autistics don’t seem to be particularly good at strategy, but tend to be creative problem solvers (mostly to try to order everything). They would then also be more likely to be introverts and anti-social, though this primarily comes about because we’re perceived as “socially awkward” by neurotypicals.