Greatest MMA Heavyweight?

not a good question to ask most of these were great in some period so no comparison can be made

but still from the options given I am inclined towards fedor and cro cop

Fedor is the all time heavyweight GOAT

In terms of names on Resume, Cain isn’t that impressive. Stipe’s the UFC heavyweight Goat.

Also, you put Barnett and Coleman over Werdum?

Daniel Cormier should be on here too

It's probs a tossup between either Stipe or Fedor

Stipe

Randy Couture

It's either Stipe or Fedor.

The Last Emperor.

It is Fedor unless you restrict this to UFC.