Robert Rex is another one of my favorite beefcake models. I am not completely certain, but think he began modeling in the late 50's and early 60's. I like the tattoos he sports in his later photographs.
Steve Wengryn is one of the most famous beefcake models of the 1950's. He was photographed by many - if not, most - of the groundbreaking beefcake photographers.
This photograph is one of my favorites and is attributed to Whiteman, of whom I know nothing.
This is Tom de Carlo, of whom I know nothing but suspect he modeled during the late 1950's and early 1960's, based on the dates of the magazines I've seen him in.