Assistance selecting tire size for 20x9 +30 square rims

[Dnsource]

I recently purchased a set of 20x9 +30 square rims and I'm in need of some guidance in selecting the appropriate tire size. Currently, I have the Mountainpass Performance coil overs on the stock rims. I'm going for zero gap and no rubbing issues.



I would greatly appreciate any recommendations

2019 Model 3

 

[Jayy 3]

I have BC Racing Coilovers and I have a 20x9 (square setup) on 235/35/20.