What are the best HDR settings for all games??

I have a Hisense 43r6000gm, TV settings are the default ones when in HDR, and in-game settings are Brightness: 640, Paper White: 1.5, and Contrast: 5, and Halo 3 and CEA look off, when other games in the collection look good. I just cant make HDR look good in all games. 343 should have added separate HDR settings for each game