For many good friends around here Ronnie would go down in bb as the greatest due to his "uncanny" genetics but i think it has to do more for his heavy dosage of HGH among other sause...
Here's why,
this is based on genetics:
For example take Arnold, who Started bb at age 15, by the time he was 19 he was the biggest bb of his era, plus the youngest competing with guys way experienced than him..when he met his idol Reg Park Reg who looked at him from head to toe and instead of saying he was amazed by this young man (he was because he never met anybody with such dimenssions) he told Arnold to train his calves like his life depended on them, 2 years later Arnold showed up with the biggest calves ever shown on bb stage!! he could have added few inches to his thighs if he wanted to, we know it's easier to increase legs size than calves, but he didn't needed it to, he was after all the youngest mr.O ever at age 23..what's left for a bb after winning the O? move on to bigger things maybe?
This is based on gear
Ronnie started bb around 19-20 then competing around 23 or 24 in mr.texas wich he won (i think)
with the gear that was available in the early 90's he wasn't that symmetrical since his arms were to long for his torso, but yet he was one of the best bb (from the knees up).
It was in 98' at age 34 after more than 10 years of heavy training and juicing that he finally took the tittle again, he probably had the worst calves in the top six that year but it was fear enough to win the tittle..
we know that GH and insulin among other "stuff" entered the scene in the md 90's and that was the ticket that Ronnie had to beat better genetically bbers than him (Levrone,Cormier,Ray,Wheler etc) we also know that a lot body parts grew alone in Ronnie's body including internal organs but his calves poor in shape grew as well...not proportional to his ballon thighs or gut but hey they grew, something that didn't happened in more than 10 years of heavy training and mad juicing .