I worked out at Golds Pacific Beach in San Diego during the 90's and Vic Richards would come in to work out as well as Nasser, Jim Quinn, and I did see Greg Kovacs in there on occasion when he was in town.
Vic was very big but nothing compared to Nasser when viewed side by side.
Kovacs looked like a big bag of shit tied together at both ends. Huge gut, very lean but looked as if he was filled with gelatin. His face was twice as swollen as Jay Cutlers and he seemed to be on so much GH that he was about to sprout a horn out of his head at any given moment.
The biggest guy offstage and in the gym was Jim Quinn. I know onstage he couldn't match up to some of the top guys but in the gym he was the biggest guy I have ever seen.
As far as personalities go Vic spoke to no one unless he knew you. Jim Quinn was a friendly guy and Nasser was very friendly as well as smart once you got to know him. He wasn't much for small talk but he was a good guy once he got to know you.