I would take Arnold in his late 1973 and early 1974 shape. 250 hard lbs. His thighs and everything else were just so much bigger than how he was in Pumping Iron. He could have beat anyone even today in that shape. He was truly the master. No slin or gh either, just some good ol' fashioned d-bol tp and lot's of hard work. I would take his look then over anyone today.
For a non drugged bodybuilder, Steve Reeves. Incredible lines. Just a beautiful person. Another hard worker. Without any supplements or juice, he looks better than most guys on the anabolic board who are doing 3-4 grams a week along with everything else.