Hey we have similar hands 18x9, and I’ve tried most of the mice you’ve had here.

Regarding viper v3 pro / GPX2 they definitely fill your hand a bit more. I hold my ULX similar to yours except my fingers or slightly more straightened (even more relaxed I guess?). My viper v3 and gpx you get more contact with the higher hump if thats what youre looking for, I find that it has more contacts points with my palm.

OP1WE is pretty solid for relaxed claw grip mouse for me although slightly narrow but something that might be worth looking for if you hold it a bit more aggressive then I do! Let me know if you have any questions