Ronnie could lift what he lifted because he was strong. He had a huge amount of muscle mass(perhap even unsurpassed), which could tolerate and produce a huge amount of force.
What is "heavy" for Dexter is not the same as what was "heavy" for Ronnie. For example...
Both trained to their maximum and beyond
Huge amounts of muscle mass means relatively little without the even-more-important other components of strength performance: supporting structures and the CNS.
Other points:
Shawn Ray did indeed lift heavy. The guy was incredibly strong for his relatively light bodyweight.
If we're talking huge capacity for strength in pro bodybuilding, Mike Francois's name needs to be mentioned.
This Dallas guy is incredibly strong! He outperforms Ronnie, that's for sure. So, yes, strong!
I concur: Bodybuilding loses steam when there are so many wimp-ass "champions" posting f aggy workout videos.