You do that, not someone else. You literally can count the amount of times a publication was cited and then check for what type of citation. You can literally count the amount of articles published by an author and the citations of each work, etc. there is no way to just “find the one person who already knows all this”

Sure there are plenty of people who have done it, but you can’t “vet” them unless they are also making peer reviewed publications, so you’ve gotta do it yourself anyway as if they are publishing, you’ll get to there content by doing the above anyway.