Kim E Lumbard broke open a cherry red Dungeons and Dragons Basic set rulebook in 1982 and was hooked for life. After a short stint as a player, he launched his own AD&D campaign that lasted for five years and started a three decade DMing spree. He's constantly pushing the forefront of the RPG artform, like when he videotaped and publicized the New World Campaign.
https://www.youtube.com/watch?v=dv_Jm9YkP7w&list=PLwcMzx3Xga0iWa-wIJ12PQXqjDH-OIWWO
In addition to role-playing, Kim is also an avid gamesman of all sorts. His Beginner's Guide to Magic the Gathering has been one of the top-rated guides on the internet for over a decade. He's passionate about writing helpful guides for people about all sorts of topics, not just games. He has a number of useful guides for managing health, finance, and happiness.
http://ugcs.caltech.edu/~kel/Guides/