Cyberpunk 2077, probably. The game maxed out will destroy your graphics card but the graphics are undoubtedly gorgeous.
Horizon Forbidden West also has really good graphics.
the most realistic game that can run on windows
Does Geoguessr count?
Alan Wake 2 is probably the best looking game running on any system, it works on Linux via Proton
You can look for specific games on protondb.com to get a good idea of how they run.
I don’t chase high-end PC gaming anywhere near enough to name a single game that is known for realism.