What about Hendo? At that point in his career he was a brawler and a headhunter, and not a very technical one. He's durable and has scary power, but his style at the time was right in Anderson's comfort zone.
Same with Vitor, and TRTor is a myth. He was comparably explosive and had comparably high T levels in the Weidman fight.
Maia was too intimidated and too limited wrestling-wise to be a threat.
Anderson was great at his specific style, and very weak against the aggressive wrestling style that seemed to be very popular everywhere except MW. Anderson was a great fighter, but also a VERY lucky one; he was lifted beyond his actual station by fortunate circumstances.
If MW had been structured like WW he'd likely have ended up being a Carlos Condit type figure in his division, instead of being considered the GOAT.
while i dont agree with a lot of this, you DO articulate that side of the argument better than 99% of those that make it.
the reasons i disagree (since we will never KNOW)are:
1. his willingness to go up a weight division is always particularly impressive to me. no, the opponents werent world beaters, but were above average and he dismantled them.
2. The MANNER AND METHODS of his wins. I love Carlos Condit, but he has never had the highlight reel finishes, and in my opinion no one has. Maybe 1, or 2, not a half dozen.
To be able to execute moves like this at that level is beyond just being a "good striker", but suggests a level of perfection i havent seen elsewhere.
Finishes of this type are not relegated to just striking. If we saw someone consistently finishing opponents with Ramage-esque Pride slams, they would make the same argument in my opinion- it demonstrates an ability to perform a high level finish on a quality opponent despite the low yield nature of the technique.
In my humble opinion, he really only avoided Jones, and while i think he would have lost to GSP for reasons you have mentioned, he was willing to take that fight.
for these reasons, i would put him #2 behind Fedor, with Jones knocking on the door.