Love Kernighan, such a humble person. In one of the videos that he was featured on in youtube, he spoke about how he was solving a difficult problem in his thesis which turned out to be NP-complete before the theory had been fleshed out. Emailed him for his thesis and got a pretty quick response, was a really interesting read.
I believe you are right as intelligent grows, but the very top end usually has people excelling in many things and personality as well. At least that’s what I noticed.