The former Rangers player believes the recipient of the main award should this year come from Ibrox.
He added: "He just goes about his job without any fuss. He has deceptive pace, he is very quick.
"He will play wide on the right, through the centre, where I think he prefers to play. His touch on the ball has been terrific.
"Guys like Kris Boyd will score you goals, Kenny Miller will make great runs and create them, but you need someone to pass it to them. Steven Davis is the one guy in the Rangers team that can do that."
Wishart hopes to see clubs outside the Old Firm represented when the top four candidates are named later this month.