Kai greene by a mile.
Cutler would look like the smooth, stocky, pasty white guy with lousy shape that he is without the drugs
Heath and greene both have better natural physiques,with much better shape and definition..... but kai is wider and thicker so he would look better than Phil.
Black guys look better than white guys naturally...deal with it
Kai is blocky with weird proportions. His legs also used to overpower his upperbody, before he started taking his doses to the next level and got a lot of years training under his belt.
Jay would just be a fat, smooth, blocky mess i agree.
Phil has good shape but very bad skeletal structure and chest insertions, he also had zero definition or size natty.
A very bad bunch to pick from, probably Kai, he is a bit denser and carries the muscle better.
Your last statement is generalistic, although for the most part i agree, with a few notable exceptions.