I would recommend Zorin OS, but honestly, anything goes, as long as you can get it running properly. No harm in trying another distro if the current doesn’t function well.
Zorin OS for now. Old kernel and stuff, but it’s stable, and I like the looks more than I did PopOS!. Maybe PopOS! is cooler now with their Cosmic thingy.
I don’t know whether I have gotten some settings wrong in Steam, but I have to open the Properties window of every freshly installed game, and set it to launch using Proton GE, otherwise it just defaults to nothing. So if a game doesn’t work for you, always check if it is configured to launch using at least some kind of Proton thingy.