There is no current game I want to play that doesn’t run on Linux. Valve really has done an amazing job with proton and getting games to work as well or better on Linux.
Now, that said, I am not big into competitive multiplayer, so take that into account. Anti cheat is still a problem since most of the current ones need permissions that are not normally given on Linux.
My understanding is that it is working much better now than a few months ago. I haven’t actually put it to the test yet, but it is on my list of things to try once I have time to set up my index again.