Well, for Hungary, you have John von Neumann and Eugene Wigner, who both finished an Elite School in Budapest: https://en.wikipedia.org/wiki/Fasori_Gimn%C3%A1zi

Well, for Hungary, you have John von Neumann and Eugene Wigner, who both finished an Elite School in Budapest: https://en.wikipedia.org/wiki/Fasori_Gimn%C3%A1zium https://en.wikipedia.org/wiki/Fasori_Gimn%C3%A1zium. And you also have Erdos. Of course, you might say they were Jewish, but they are the product of the Hungarian School of Mathematics.