Like a documentary? I'd say Dorian, Ronnie, Lee Haney (yes, he is not a recent retiree), Flex, Shawn, Levrone
Or even Phil Heath and Kai.
With Dorian, Ronnie, Lee Haney, Flex, Shawn, Levrone, the use of old footage would be mandatory. Philosophies, stories...interviews, etc.
Levrone's story would be interesting---injuries, his band, acting, and his eccentric behavior.
Phil and Kai---their lifestyles.