1. The HN karma leaderboard at https://news.ycombinator.com/leaders . You can find the list of people ordered by karma points, from highest to lowest. Obviously, the ones at the top have contributed a lot of appreciated content here.
2. HN Profile at https://www.hnprofile.com/. Use this to find an expert on a specific topic by just entering it there and hitting Search. This site has been submitted here as a Show HN more than a few times. You can browse through the comments by the users in the search results and decide.
Or maybe they just wrote a bot to submit articles 10 years ago and left it running.
Not really looking to follow anyone on yet-another "social"