True, but usually the structural engineer doesn't play such an outsize role in determining the design. It was Khan's bundled-tube system that gave Sears its shape, and it was his diagonal bracing that is JHC's most distinctive feature.
I'm not trying to minimize Graham, but from all accounts, Khan had a huge hand in the design that is very unusual for an engineer. From my perspective, he deserves just as much credit.
la forme d'une ville change plus vite, hélas! que le coeur d'un mortel...