I recently joined this group and saw this discusssion. I had to weigh in because I've been a bodybuilder for 30 years and it would be fair to call me extremely developed. I have not taken steroids and I have achieved a high level of muscularity and muscle mass. I currently weigh 255lbs at 5'11" and my bodyfat level is quite low.
Natural bodybuilders can get extremely large and muscular without steroids. It may take longer and require a more disciplined lifestyle but it can be done.