Something a bit off the beaten path to potentially discover something new:
Dirk Gently's Holistic Detective Agency - Douglas Adams, detective comedy in a fantasy world, a tiny sprinkle of horror. Great audiobook.
Trail of Lightning - Rebecca Roanhorse, post-apocalyptic world with elements of prime nation mythology.
Starship troopers - Robert Heinlein, is it hilarious criticism or unconditional support of the military industry? Who knows! I laugh my way through it, some take it very literal. Either way, great sci-fi with political commentary.
The left hand of the darkness - Ursula Le Guin, because no sci-fi list is completed without a Le Guin book. Exploration, action and discussions on the meaning of gender, written by the best sci-fi writer possibly ever.