Pretty sure Zane's nickname was, "the chemist"
He never prided himself on being huge, (I think his arms were like 17") his shtick was to be the statue or The Farnese Hercules with perfect proportions.
Sergio Oliva "The Myth" in the day was a true awe inspiring huge BBer and had some good strength to back it up.
Columbu too was an ex oly lifter and boxer.
Leroy Colbert was another large individual but still looked to some extent, human.
While it is true that they used drugs way back in the 50's maybe even 40's, the stuff used now, goes way beyond what some of the top guys used and looked like back then.
It seems more now, guys are described as cattle. :-0