For me it's probably Jazzpunk, but I liked Disco Elysium too. I've been looking for something to scratch that "Jazzpunk surrealist comedy itch" for a while and not many games have come even close.
Callahan's Crosstime Saloon - (it is now abandonware, you can play it for free) if you have never heard if it but like sierra/lucasarts style games you really should give it a try. Extremely funny.
But also the Monkey Island Series and Grim Fandango?