Not anymore. Not quite. He's pretty old now, has been out of the game awhile, and we're in the USADA era.
He's a fighter who physically dominated his opponents with his wrestling and cardio, and relied on his good chin a bit too. All of that stuff goes with age.
I definitely don't think he capable of bullying Brunson. Brunson is strong and a good athlete. Mousasi is too well rounded. Hall and Whittaker would be easier to beat with just wrestling, but I'd still pick them to win. I'd pick him to beat Vitor though.