Looking for new authors/books

I am a creature of habit. I read the same books multiple times a year. So I’m trying to find an author that will be similar or books that are similar to the ones I love. I read Chuck Palahnuiks invisible monsters a few times a year. And yearly I reread choke, sirens of Titan and slaughter house five by Vonnegut. 1984 is also a yearly staple for me. But I’d like to branch out a few more books for my rotation so any suggestion is greatly appreciated!

I guess I really like the pessimistic authors. Lol