These are all fantastic recs and I would particularly point out Use Of Weapons.

I would also add Ursula K. Le Guin's Hainish series books like The Left Hand of Darkness, Rocannon's World, The Word for World Is Forest, etc. Le Guin's writing is extremely easy to parse so on that level it's a good fit, especially the earlier books in the series, but the themes are still complex and extremely relevant. She was an amazing author.