[skybrian]

Has any company actually figured a way to implement the first choice? Hiring is highly subjective. We don't have any foolproof way of figuring out who the best developers are (it's not a well-defined question) and no one has yet come up with a practical way to avoid unconscious bias.

The closest thing I've heard is asking someone to remove identifying information from resumes before screening them. (Blinding the screener.) That should at least help you get a diverse set of candidates coming in. I would think positively of a company that does that.

But the interviews themselves will still be biased and the only question is whether you realize this or you're fooling yourself.