Yeah I think there would be a lot of good answers. But basically they would need to be scaled back at least 1 division. For example, the middleweight and lightweight bodybuilders would probably translate to physique today (and even then they might be considered a little small by today's standards).
I'd say Laura Binetti, Paula Suzuki, and Tina Lockwood, in terms of the Bodybuilding category.
You can choose other categories as well, besides Bodybuilding. For instance, I think Cory Everson would have done well in today's Figure category.