I am constantly adding new links and resources to the sidebar, and I've just added an entire section with links to biographies - usually on Wikipedia - of "self-educators, polymaths, and lovers of learning." The word "polymath" refers to a person who is highly skilled in several disciplines or fields of study.
The list is far from complete - I could put a thousand names on it and still miss countless famous and unknown self-educators and lifelong learners. But it is worth exploring; I included quite a few names that I hadn't heard of until today. I'll continue adding to the list in the coming weeks and months.