No... I expect they all were. And of the guys you listed, Big Nog and Crocrop at the time were elite although very one dimensional. Big Nog has barely average standup and still can't defend a takedown. He spent the majority of his time fighting Fedor on his back. Crocrop had a decent sprawl but again zero ground game and spent a good portion of the fight on his back. When Fedor fought the rest they were either B fighters (like Sobral and Herring), past their prime (Coleman was 40 when they fought) or simply not very good (Arlovski and Sylvia). Arona was a middleweight with 2 fights to his name when he fought Fedor. Hunt had zero TDD and zero ground game when he fought Fedor. If they fought today, I'd take Hunt every time.
-Nog never
wanted to stop a takedown. That's like making fun of Demian Maia's takedown defense. You're pretty much retarded if you take them down.
-Crocop was fairly one-dimensional. But not really any moreso than JDS, Arlovski, Black Beast, Hunt, or Browne.
-Sobral and Herring weren't B-fighters. Sobral was 19-2. Heath Herring had just beaten Igor Vovchanchyn and Mark Kerr within the last year and was
the heavy favorite going into the Fedor fight.
-Coleman was older (he also didnt start his MMA career til he was in his 30s) but was 7-1 in his last 8 fights, with the only loss being to Nog, and which included wins over Fujita, Goes, and his huge win over Igor Vovchanchyn to win the Pride HW GP. Fedor fought Coleman in the very next HW GP.
-Saying Arlovski and Sylvia were never any good is laughable. Both were top 5 HWs when Fedor fought them.
-Ricardo Arona... yup.. it was his 2nd fight. It was also Fedor's 4th fight. Arona also won gold at Abu-Dhabi that year and the next year without losing a single point against anybody, which is still a record. He then went on to win 10 of his next 11 fights, which included wins over Wanderlei Silva, Dan Henderson, Kazushi Sakaraba, Guy Mezger, Gustavo Machado, Dean Lister, and Ninja Rua.
-Mark Hunt wasn't supposed to be the original opponent. Josh Barnett was. He was still a 300 lb. K-1 Champion who is probably the hardest puncher in the HW division over the last decade and has probably the best chin in the HW division over the last decade. Fedor also had a widely publicized broken big toe. He still finished him in the first round while taking zero damage.
As usual, it just kind of sounds like you have no idea who most of these people were or what they were like back then.