You could have just typed one or two names instead of typing that paragraph though. There aren't really any guys he could have fought. Masivdal, Covington, Burns, Woodley, and Edwards were all rightfully in the top 5 for a lot of his reign and he fought all of them. So who else is there? He had also beaten RDA and Maia prior to his title reign.
If he took a huge flyer and fought someone like Wonderboy then we'd just be saying that it was a bad win in hindsight also.
I'm not trying to be argumentative, I'm legitimately asking, who are you thinking about? People like to phrase it like he only fought two guys, but he basically most of the top ten.
The guys who are good now are from a younger generation than Usman.