I mean...if you want to stick to that UD vs SD dettail as if we didnt actually watched the fights is cool but honestly, that only confirms in my eyes that your argument is pretty cheap.
I give Whittaker full-credit as the #2 MW of his generation becuase he has proved his worth against top fighters of many different styles.
If I asked you who is the best wrestler Vettori faced you answer Hermansson...and Hermansson, the tale ends there. Well maybe Akhmedov, which resulted in a draw.
You are giving Vettori full credit basically because of that thing called recency bias.
Let me know in dettail about that evolution in Brunson already in his late 30s after a decade plus in the sport. Not vague generalizations about "evolving" but actual aspects of his skill set in which we appreciate a clear evolution. And tell me againt who he showed them, like Elias Theodorou or who exactly who compared with the guys listed in the OP.
Because we do know that Brunson is in a major org since 2011, by the time of the list in OP he was barely even ranked yet in 2021 at 38 years old he is #4, as high as he has ever being, and you will tell me that is because some vague "evolution" as if I didnt followed his career lol