A mixed solution seems more equitable - if there is a "rockstar programmer" invite them as a "Keynote" or some other more select engagement. Have only a small number of these speakers, and hopefully their credentials speak for themselves.

I only wish it was possible for smaller organizations to take advantage of blind review processes for speakers.

You could do a first pass where someone make a note that they're famous, without mentioning the name.

And here we see how ridiculous is the claim that technical and educational issues are the drivers of a conference.