Just on the off chance that Ronaldo and his DS are real, may I give you some heartfelt advice?
You are not creating anything but a child who will be viewed by all other children at private school as odd and a wierdo. He won't mix effortlessly and influence others and become a well respected leader; he will be an oddity and an outcast and probably very unhappy.
Why do I say this? I have three DCs who have attended/are attending several of the top private schools in the country (ones which would certainly meet your standards) and I have seen children like your son. The ones who arrive at secondary school with GCSE Mandarin, but never make any friends. The ones who do nothing at home but work or play music and don't know how to interact.
There is a modicum of modern culture which provides a shared, binding experience and is partly how people connect. Etonians play football and support football teams just as much as they do rugby. My DC3 at his very traditional prep school, where two thirds of the children learn two classical instruments, was the star of the school the day after he bumped into an X factor contestant and had his photo taken with them.
Interestingly, I do think sport also plays a vital role in helping children connect so I would heartily recommend you remedy this ASAP. I am thinking of another child I know, with older, very traditional and academically aspirational parents, who studies hard, plays numerous instruments etc. He is a bit culturally different from the other children, but his parents were smart enough to make sure he played football. He's an excellent striker, and it's transformed how his school life has turned out.
Many people can achieve all you hope for without being as limited as you are being, and your DS would be happier and arguably more successful if he could connect better. And frankly, the people you aspire for him to mix with manage to excel at academia, sport, music, being clubbable, current and cultured all at the same time. Your DS is missing many vital attributes he will need.