I like Turner too, he would be good value outside the top 10 and as you say, a good fit. I don't think he's a home run, though - he may not be effective from NBA 3pt range (currently sub-.300 from the college 3pt line), and if he doesn't develop that he's probably non-starter material since he is unathletic, un-quick, not especially strong, and awkward/not fluid. He has touch and length, but with mediocre tools can he be a better-than-average interior scorer? His tools also raise questions about his upside on D - he can be solid for sure based on college numbers, but will he necessarily be an upgrade over Zeller on that end?
At #15 I'd be very excited if he fell to us. At #9 though there's a lot of options I like better: Porzingis, Hezonja, WCS, Winslow, Oubre.