The most impressing thing about Flex was that he was at his best when he was only 210-215 lbs. He was raping guys 20-30 lbs heavier.
And in some cases, more than 30 pounds. In 97 Flex was 224, Nasser 280, you do the maths.
Like Wiggs had said, Melvin and Shawn are close in structure---shape wise, but they lack the full roundness of Flex's muscles. Melvin had one bicep that had two peaks, like Ronnie's biceps, and Melvin's back detail was not as good as Flex's, plus he tended to look like a Big headed baby--a large head.
Another person who was structurally like Flex is Jojo Ntiforo, from Ghana. All seem to have the problem areas of lower back-glutes-hams. And all seem to look their best at lower bodyweights. And all seem to have light-weight structures that are meant for carrying under 240 pounds, aesthetically. Above 230ish, is pushing it.