Kinda surprised nobody mentioned Charlie Munger, 99.
LinkAfter Munger, then Kissinger, I remembered reading (here I think, maybe on Liners) about the rule of threes, then I saw the news about O'Connor.
Btw, Legacy.com each week has a tribute on YouTube to well-known people who have passed during the last week - on their thumbnail, they usually show 3 people with the most well-known in the middle. I wonder who gets that this week.
Edit - Ok, forget that, it comes out Fridays, the 1st 2 were skipped on that and O'Connor will probably be on the one next week.