If you're into fantasy, look into The Wheel of Time series. It's dense, absolutely packed with characters, and the world has a ton of detail. It's also 14 (rather large) books long, 15 if you count the prequel, so if you like it it'll keep you busy for a good long while.
If you've seen the Amazon series based on the books and were turned off by it, maybe give the books a try instead. The Amazon series doesn't do it justice, in my opinion.
If you like sci-fi, I recommend Project Hail Mary. It was written by the author of the book that became the movie “The Martian” (also supposedly a real great book, and on my list). Same guy wrote the short story “The Egg” that’s a pretty good and quick philo-fi.
If you like sci-fi, I recommend The Expanse books and novellas.
The audiobooks narrated by Jefferson Mays are also good, as is the TV series, though they tried to cram too much into the last season, IMO, without actually finishing the story. The ending in the books is tons better.
A friend literally just gifted me a copy of this because I've been feeling so burnt out by capitalism, and let me tell you, I devoured that book. It spoke to my weary soul. And made me want to quit my job (I already was wanting to quit my job)
Read the Vorkosigan Saga. Lois McMaster Bujold. The audiobooks are also outstanding. Long series with fantastic characters, each one distinct. It's a big space opera. Totally worth it.
Charles Stross has many great books. With different styles. I really like 'The Laundry Files', but the first has too much technobuble and 'The Merchant Princes' which is one of the best book series I've found in the last few years.
I read Moby Dick once and it was not enjoyable in the least. It is boring as fuck. Maybe it's imitating through prose the long monotonous stretches between whale sightings, but that's not an engaging read.