I'm an engineer building out a store called Magic Web Store that people can use without having to self-host anything and they get paid in bitcoin. I also run a store myself and encourage others to sell things or their labor for Bitcoin.

I wouldn't put myself in the top 3 people in any of the categories that you mentioned, but if you think I might make a good guest, I'd be happy to chat. Full disclosure: I'm not an articulate social butterfly; I'm a geeky engineer. However I am extremely passionate about what I do.