Someone from
Linux mint ideally Clement Lefebvre
Ubuntu Mark Richard Shuttleworth
Steve Wozniak, although I suspect no chance ! Ok he is not foss but deeply involved in technology
I dont know any of these and just how good they would be, perhaps they would iffer another from the organisation more used to presentation or public speaking.
If possible
Debian
Puppy
Red hat
Any linux system in the top 20 of distrowatch
Not sure developers are interesting to hear from such as nemo, gnome, xfce or similar this list is extensive
Software app development such as gimp, libreoffice, chromium again long list
NovelWriter → Novel writing software. FocusWriter → Writing software. AVLinux. → Linux distribution catering to multi-media CREATION. CherryTree → Note taking application. HaikuOS → Operating System (something different than Linux) aiming for the desktop.
All of these had, as far as I’m aware, little exposure. At least three of these are maintained by a single developer.