Is there a list of games that run smoothly on Linux without native support?

Even if a game doesn't look like it'll work based on protondb, try it anyway. Many times I've had games that were marked as low ratings start up without any changes lol. I remember even when d4 beta came out, I saw people struggling to install and play it on the first weekend... Worked out of the box for me.

There's also the wine appdb on the winehq website.

Sort by platinum rating and that'll get you games that run with no (or exceedingly minimal) issues