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.
I just tried 2003 on emulator and I really tried to like it. You're right, it's really funny. But oh my god these controls are ATROCIOUS! I get it was 2003 and gamecube controllers were already wacky, but I really wanna punch the guy in the face who decided that to throw an out to a base you need to press TWO BUTTONS AT THE SAME TIME.