Zero.
But I'll give it to the SOAB, he's got skills. Focus, Mentality and bike handling. Not of those get you TdF wins when clean.
If you take part in enough though, there will be stage wins, and do all worlds to get one or 2 of those. Some classics, sure. Maybe a one week stage race if the slacked or he set his mind to it.
And about who'd have won in stead, in a clean sport... Ullrich seems an obvious choice, although we never saw him clean. He did fairly well on mini-dope and a steel bike. (I love steel BTW, I think it's fast).
Perhaps Bassons and Moncoutie would really have been to the front. I believe Bassons most, byy a margin.
And where Armstrong got a free pass, the best docs and was a top responder, somewhere in the peloton there must have been lesser responders barely doping to a gree worth the risks. Nameless in 50th, hardly ever going for a stage win. In a clean sport, rewarded by easy results, their careers would have gone very differently. Not domestique but supertalent team leader. People riding for you.
We will never know their names, but it's interesting to ponder.
Also don't forget those who never gavve it all for cycling because they could not compete. I was deemed talented, but when-ever I was in a race with pro riders, they level discrepancy was just overwhelming. I could win local stuff against folk who'd train twice as much and hard. But in the big least, it was disheartening the way they slaughtered me. I could not see myself train to overcome that difference. I was slacking alright, and had lots of room to improve, but maybe half of what I was aspiriting to. Wheel to wheel with MTB and CX pro's, is was just not funny. I knew the Watts I pedaled, so their output and recovery was clearly unheard of. No way for me to train to get 150W extra on top of the 506W I already had. Just not gonna happen. Not to offer myself as an example, but there were better self-motivated riders like myself who'd have decided to go pro had the top level been several categories closer. Who'd walk to a place beyond the horizon at night? Something you can see, you can walk to. The difference was another world. On my best day I was slaughtered, and I was not the only one. I knew about EPO, but not how wide-spread it was and the performance effects associated. I thought of it as a supplement that worked every time, and only a bit better than the legal stuff I tried. Like Armstrong, getting 30+% more red blood cells and possibly even extra oxygen through HemAssist...had I known, I'd have quit cycling sooner.