I have no problem admitting that my favorites are on something. I've thought that Eddie, Benoit, and even Rey have been on something for years now. But some of these guys, like you mentioned Shelton, it is possible and possibly likely, that they are all natural.
I'm just saying it is possible to get pretty big by just working out, diet, and other natural means. Just because someone is toned doesn't mean they are cheating to get that way. To say otherwise, to me, insults those that decide to do it the natural way.