It's difficult to say between Disco Elysium and No Man's Sky, but I'll say I'd be most excited to give No Man's Sky a spin. I used to play a game called Noctis IV. It was a tiny little game developed by a solo Italian developer and had a small, but devoted community to playing the game.
There was almost no story, but you were an explorer seeking to log the universe. There were a tremendous amount of stars, planets, and moons and you could dart around to them, descend to the surface and attempt to explore. Some even had life, but they were few and far between. The graphics were rudimentary and if I recall correctly displayed at an eye-watering 320x240 resolution, but it was such a unique and relaxing game. Really forced you to engage in your imagination a bit. I'd go to different systems, log each planet and moon, and fly off somewhere else. There wasn't much more to it.
So, anyway, I'd like to give No Man's Sky a try as I'm pretty sure it would be like Noctis IV but slightly better.