Maybe I've just been out of the scene too long, but can't let mention of Linux gaming luminaries go without Ryan C. Gordon of Loki Games/icculus.org. For many years, if there was a big project coming to Linux, Ryan Gordon was likely to be the wizard behind it.
His homepage: http://icculus.org/
Wikipedia: https://en.wikipedia.org/wiki/Ryan_C._Gordon
Patreon: https://www.patreon.com/icculus