Thanks for your interest. Re non-profit content at SXSW 2019, please check out the “Social & Global Impact” track — see https://bit.ly/2zwBM92
Also check out the Community Service Award honorees for SXSW 2019. For this, see https://medium.com/@hugh_w_forrest/2019-sxsw-community-service-honorees-9254972f08e0
Some great ideas here for SXSW PanelPicker success! If you are wanting to enter a speaking proposal for the 2019 event, then you’ll also find some important tips via this Medium post (which will be updated daily through the Friday, July 20 deadline).
Interesting story, but seems like you are kind of ignoring Casey Gerald, who is the March 11 keynote for SXSW Interactive.
Also ignoring SXSW 2016 Featured Speaker Anthony Foxx, who serves as the United States Secretary of Transportation.