I have never seen where the person-with-nightmares was revealed as a donor, or indeed any clue as to who they were other than 'someone Eliezer knows'.

I sent you 3 pieces of evidence via private message. Including two names.

Very few people are so smart they are in the category of 'too smart for highschool and any university'... many more are less smart, some have practical issues (need to work to feed family f/e). There's some very serious priors from the normal distribution, for evidence to shift. Successful self education is fairly uncommon, especially outside the context of 'had to feed family'.