My joycons are quite loose in my replacement OLED but I'm in a similar boat to Intoxicate in that I don't want to go through chancing a third console being Goldilocks.
My first OLED had a knackered screen with weird green artifacting. But the joycon sat tight as anything in it.
The replacement has a uniform screen with a slight yellow tint that I can live with. But all joycon except the Hori Split Pad Pro are loose in it. The wobble on the left is noticeable during play. I have a roll of Gorilla tape so might try that trick.
I've learned most of the looseness of joycons on Switch consoles come from the rails on the tablet itself. My partner's v2 Switch has really tight rails and her joycons are actually difficult to remove even after 2 years of ownership. The same joycon she uses are looser in my OLED. And my "loose" OG Neon cons are tight in her v2.
P.S. is the plural joycon or joycons?