I don't know if this info hurts or helps beginning bodybuilders.
On one hand a goal of 5' 11" or so at 200lbs is qiuet good naturally, in fact excellent. A gentically gifted man could achieve this without supps, and drugs, it would take sound training, good diet, and enough rest. Basic stuff.
On the other hand, even though rare there are people who exceed this without drugs. Not many at 5'11", but I train an indivdual who weighs about 225-227lbs and he's probably around 9%.
At a height of just under 5'11" I have achieved a build of 210lbs, single digit body fat, without drugs (I have been clean for about 10 years, with drugs up to 230lbs single digits). My body weight now fluctuates between 200 and 210, and still single digits are held.
Once the drugs are out of the system the bodies natural levels of GH, Test, etc. go back to normal if excessive amounts of drugs were not used. So yes it is possible for a person to do it without drugs, rare,but possible.