We alreaduy have one in Marvin Williams, although he can at least hold his own as a SF. And we have another in Millsap who, due to his tenaciousness, can compete against most starting PF's in the league.
I definitely wouldn't trade Kanter for him. It's likely Derrick Williams becomes a decent backup as a swing forward. And yes, I'll admit I was one of those who thought IF he could play SF, it would create a tremendous lineup for Utah. Glad Minny got him instead.