@hosford42@GreenRoc@Susan60@actuallyautistic@neurodivergenceNeurotribes goes into great detail about Henry Cavendish, an 18th century British physicist who's probably best known for (a) discovering hydrogen as a distinct substance and (b) figuring out a reliable way to measure the strength of gravity in general. Prior to that, we only knew how strong gravity was in the context of very large things like the Earth's gravitational pull and the way planets and moons orbited.
Checks all the boxes, right down to a strong preference for routine and an aversion to social gathering, which (thanks to the social norms of the day) probably kept much of his work (apart from the topics already mentioned) unrecognized at the time.