186. Ronald Lauder
The youngest son of makeup maven Estée Lauder, Ronald has spent a total of 39 years on its board, having taken a break between 2009 and 2016. Chairman of Clinique Laboratories, he is the father of Aerin and Jane, newcomers to The Forbes 400. Outside of the publicly traded cosmetics firm, Lauder has years of experience as a diplomat, serving as deputy assistant secretary of defense for European & NATO affairs from 1983 to 1986 and, later, ambassador to Austria from 1986 to 1987.