Francesco Moser blood doped for his world hour record (before it was banned). Team USA blood doped for the '84 Olympics (before it was banned). Otherwise, there are not a lot of accounts of blood doping in cycling prior to the EPO test in 2003 (aside from Lance, who was a few years ahead). I don't think the peloton was blood doping in the 80s. It was mostly amphetamines and some hormone therapy (i.e., testosterone). Not the kind of game-changing stuff that would prevent a clean rider from competing. LeMond has said he didn't dope and has put himself way out on a limb to do so (sacrificing his multi-million dollar bike business because he wouldn't roll over for Lance). His reputation as a clean athlete is near-universal in the sport. I believe him. If he was a closeted ex-doper there's no way he'd be as outspoken about doping issues as he is, well before public opinion finally turned in his favor, essentially making himself a pariah.
There were quite a few really good to great riders who got blown out of the peloton in the early 90s. LeMond, Andy Hampsten, Charly Mottet, Edwig Van Hooydonck, among others. Guys that refused to use EPO and went from champs to not even able to keep up with the water-carriers. Saying "every top-level pro cyclist is/was a doper" might be easier to get your head around, but it's just not true.