Civilization V is it for me I think. Very cozy, very comfortable. Not playing on the highest difficulty, just playing fun civs with half the brain turned off. Like solitaire.
I also have a save file of Football Manager 2017 that I still come back to now and then. That save got me through some rough times back in 2017 and I played it super intensely then. Formed some strong emotional attachment to some of those pixels.
These days I don't really play it but I have a hard time letting it go. Sometimes I fire it up and just browse through the menus a bit and then quit. Like checking in with some old friends. It's really a testament to how unhealthily obsessed I was for a while there, I guess.