What Size Tires?
 

Ok so. 19x10 up front and 20x12 in the rear..

First off what offset would people say I should be getting and what tire sizes for the wheels?

Goal:
I do not want to stretch the tires. I need them pretty square if not bulging outwards a bit. Why? Because I have to approach my driveway at an angle (it slopes up about 30 degrees or something) and so a stretched tire would leave the rim exposed to the driveway and damage it.

So without stretching the tire, I also do not want to make any adjustments to the body/fender etc.

Car will not be lowered btw.

Please help out I suck at this kinda stuff!