We know that every single competitor in the Eastern Bloc was being doped and could not compete without it.
What is wrong with retroactively stripping all of them of their medals and placings?
Do it. And while you're doing it, strip any other competitor of medals and placings who violated the letter or spirit of competition by doping with drugs (where that is proven or admitted) or using blood doping while it was still legal.
Even medalists from the 2000s and 2010s are still rife with known dopers, athletes from countries where doping was untested and rampant and protected via corruption or extortion, or athletes from systematically doping teams.