coleman..
coleman ws also anounched as a natural bber at his first ever O outing no? 
probably - he did compete as a publicly announced Natural athlete way back in his early career. He looked good: tall lean, lots of muscle, nice clean lines to him. But only about 220.
I remember one show ( 95 or 96 ) when he obviously had begun to use AAS- some nutbar in the audience yells out " show them what being natural is all about Ronnie !!" I think he beat Wheeler at this show but my memory often fails me.
He was fully loaded in 96. The gyno he sported in the 98 Olympia was something else- almost beat Franco Columbu's ( 1981 ) for top honors.
He was finishing near the bottom of the deck in his first forays into the big show. 16th , 10, 6th then 9th, then has never looked back. ( i probably left out some of his placings as I do remember some but not all of them )
There probably has been other athletes who have won the top show after finishing 9th the previous year, but I can't think of any at the moment. Maybe something analagous has happened in other sports but again, I don't know. Probably in Nascar racing.
He may have been natural when he first entered the IFBB but within 2 or 3 years , he converted.