From experience I would say 285/70R17 or 285/70R18. I was informed that 285/75R17 would be the largest tire that would not rub, but I have discovered that indeed it is not the case.
Basically, at full turn the front tires rub the rear lining and the bracket. I ended up removing the liner since it got torn and the metal bracket it was protecting. I have the King setup so maybe it is different with another lift. I may have to modify the front wheel lining as well.
With current modifications I think I can fit 35/11.5R17 tires.