I can't think of one other BB with a "Wow"-factor like that. The guy definitely took muscle size and density to a whole new level 
When I see this guy I don't think "wow" , I think deadpool 2023.
But tbh he is incredibly huge, seems to usually have really good conditioning, if he's using oil I can't tell where. So other than his wide waist and varicose veins it's hard to really fault him. But to suggest that he's the most impressive BB ever.....you can't be serious.