meh… for most of his career no one could even get close to him, PED's or not, he did have an unusually suitable physique and a director sportif with an incredible talent for managing a race. If you look into test results and people who were caught with something or other, basically all of the top people were doing something too… The folks at the bottom can grumble all they like, but I'm not convinced they'd have done any better regardless. I'm more of a believer in the "you can't make a race horse from a donkey" theory of things and was made to think a great deal by listening to an ethicist who argues that performance enhancing drugs are no more sport altering than using the latest and best equipment. Part of his argument was that some countries could not afford to get their olympic athletes the newest most amazing stuff, like the drag cheating swimsuits or send them to year round training camps etc. He figured PED's needed supervision and oversight, but banning (for adults at least) them was arbitrary. He figured a "level playing field" is a fantasy, as the people who compete at these things and are at the top already have something that ordinary folks just don't - be it superior physical strength, a body incredibly suited to the sport (ala the swimmer Mark Pelps), bigger than average lungs/heart etc.
And if you don't think sometimes your equipment can make a difference, Lemond won over Fignon because he used a clip on aero bars and an aero helmet for the final stage that year, an unusual TT into Paris. Those items had previously only been adopted by triathletes, but Fignon who went bareheaded and on a regular bike lost enough time to lose the entire race. Was that fair? It wasn't against the rules, but was certainly a PE.