Not sure you've checked already or not, but this seems helpful: https://hn.algolia.com/?query=best%20comments

And back in the day when karma points were public: https://hn.algolia.com/?sort=byPopularity&type=comment

Are there any HN-ers whose public list of favorite comments contains what you're looking for? I typically use the functionality more as a bookmark. https://news.ycombinator.com/favorites?id=yread&comments=t

I encourage you to seed your new subreddit with some examples.