And then there’s former East German shot putter Heidi (Now Andreas) Krieger
http://en.wikipedia.org/wiki/Andreas_Krieger
Ah....now you’ve touched a nerve. In the wake of the collapse of the Berlin wall and files showed almost every East German athlete had doped which would have disqualified literally hundreds of medalists the IOC in their wisdom declined to do so since it would have been very messy. In the case of Ben Johnson they said he was caught red handed so to speak and there had been a judicial inquiry which wasn’t the case with the East Germans who all whizzed by the tests at the time.