Been obsessed with character-driven stories lately, and the AO3 tag system is my navigation beacon. For Harmony, I don't just search the pairing tag, I filter by 'Angst', 'Emotional Hurt/Comfort', and 'In-Character'. The real standouts often have lower kudos but meticulous comments dissecting character moments. I found this one, 'The Last Enemy', not through the front page but by looking at the bookmarks of authors whose other works I loved. It's a wartime fic where the emotional depth comes from Hermione's struggle with spellcraft ethics and Harry's detached leadership. The prose wasn't flashy, but the quiet moments of understanding between them, buried under duty and fear, wrecked me.
Sometimes, though, the best stuff feels buried. I'll sort by 'bookmarks' instead of kudos, because a high bookmark count often means a story readers return to, not just one they liked once. Discord servers for specific, smaller Harmony communities have recommendation channels that are goldmines for hidden gems you'd never find on your own.