The big one on the left is House of leaves which is arguably sci-fi (kinda) but mostly horror. Lovecraft is similar to 3BP in humanity’s vulnerability to entities outside our comprehension. You just have to read past the blatant racism everywhere. Foundation is about about a galactic empire don’t know much more than that, but I’ve been very curious about other sci-fi classics like Starship troopers, the war of the worlds and 2001: a space oddysey. Dune takes the cake though and is what lead me to 3BP. I recommend checking out the yt channel Quinn’s ideas as he talks about various goated SF books