I have two that I just adored:
Truman by David McCullough -- amazing.
Personal History by Katharine Graham. I loved, loved that woman and her autobiography was so interesting.
You've beat me to the punch. I thought Katharine Graham's story was gripping. It read like a novel.
You ought to try it. Although the privileged have an incredible advantage (due to family money, networking with family friends, and what I believe are better genes -- so many families have multiples going to the Ivys, for example -- legacy might get them in, but legacy doesn't give them passing grades from profs who aren't wealthy), I liked reading the biographies of those who weren't born with silver spoons in their mouths.
I finished my homework at school.