Herring was not B-List. But anyway...Brock lost to 3 of them, and i think a lot of HW's would of beaten Couture at that point...
He lost to 2 of them in the sreak I mentioned. Herring is alright but he's not exactly a name I would have included in the great run. Like Stann and Bisping in your line up, he was def a weak link.
Couture might not have been in his prime form, but he was a hall of famer who at that time was holding the belt. That's a big thing for anyone to face.
Mir was still regarded as one of the biggest HWs at the time, and highly rated to once again beat Brock and take the title. It was a fight for Brock to lose against one of the most talented and popular HWs at the time.
Carwin was a killer. His streak of wins was amazing. An undefeated knockout specialist. That was a huge opponent to face.
Velasquez was yet another undefeated killer. Brock may have lost but I'm just talking streak of opponents, not streak of wins. Velasquez doesnt really need an introduction in this list.
Overeem, at the time regarded probably the best HW in the world, and still top 3 or joint 1st. It doesnt really get too much bigger for a heavyweight to fight Overeem, so it just caps that run off greatly.
Couture, Mir, Carwin, Velasquez, Overeem.
For someone to pull 3/5 from that list is pretty awesome, especially if they are "all hype" as a lot of people believed.