(I mention this so more people can know the list exists, and hopefully email us more nominations when they see an unusually great and interesting comment.)
Interesting -- I just use https://news.ycombinator.com/best?h=168 for a weekly roundup, but that only tracks posts. Might need to supplement it with highlights or similar.
Reviewing the HN docs, https://news.ycombinator.com/bestcomments?h=168 might also be a good summary link.