The problem with that is that Overeem was clearly using, and, as i pointed out, the avoided defending his title for three years to avoid USA testing, as weak as it was. And the fact that he felt he needed to do it even before USADA tells you how much he was using. The other problem with that is Overeem was not Coleman or Randleman before using or after. He was Overeem, and it's not about whether he looked like them, it was about how blatantly different he was than original Overeem.
When he failed his UFC test, his T/E ration was 14/1. Normal is 1/1. That's insanely blatant juicing, and, no, this sheer mass compared to Randleman or Coleman was not comparable. Randleman, before and after fighting Fedor also fought at 205. Coleman, when he fought Fedor, was 224. Overeem spent 8 years and 30+ fights as a LHW, and then, within a couple of years, was cutting weight to make the 265 limit. Please.
And Fedor didn't outright refuse to fight him. Fedor said he'd fight him if he passed a PED test. Not at all the same thing. Did Reem take one? If all he had to do was pass a PED test, and he refused to do so, couldn't you argue that it was Reem who ducked fighting Fedor?