So with all the mura talk I ran through my rotation of games again (and Kayak):
Resident Evil Village: Absolutely no mura in the title screen in the snowy field. I looked around in all directions and other than the lower resolution it looks great. I loaded my save right before the end of the castle and walked around, there is mura lightly visible around in the castle if I look for it specifically, but I forgot about it very quickly. It is worse in select areas (but never unbearable), and generally while playing RE8 I don't have the frame of mind or spare time to notice it even if I wanted to. And in the outdoor sections or in the very dark sections or well lit rooms it's not visible.
Moss: Can notice it in the Unreal Engine title screen at first load, then once in the game, not noticeable for me at all.
Puzzling Places: No noticeable mura.
GT7: Did a Tokyo night race/raining race (2 laps on each), both had no noticeable mura. Day races definitely will not.
Synth Riders: Got my first perfect track!! Also no noticeable mura.
Horizon Call of the Mountain: No noticeable mura on the Safari.
Kayak: Costa Rica Junge, Night: Very bad mura, not enjoyable to play. Costa Rica Junge, Day, perfectly fine, no mura. I'm not the biggest fan of Kayak, but the mura in the jungle at night is the worse I've seen. This is what I imagine Saints & Sinners 1 to be at first before you get to the town, but hopefully it's not this bad. Still, the vast majority of Kayak tracks either have no mura at all or not anywhere as bad as that one level, but luckily it's not an issue in any other games for me.
Next up to play for me would be Saints & Sinners and probably the Star Wars Demo - I don't recall seeing mura in Star Wars, but it's been a while. Won't be done with what I have now for a while yet though.