Remember the chuck, wand and page circle. More so in mma than any other sport, that .kind of logic rarely adds up.
Machida, page, evans.
To an extent, silva, chael, maia.
Still, your arguments for fedor are sound. One issue though is that those he fought that did move down, hammer house primarily, never faired too well. Still, he would absolutely hang with many 205 ers. Evans, shogun, page would get hurt. Lyoto has a great skillset for him though