David Lee is the best offensive center. He played great there under D'Antoni years ago.
The SF position (Turner, Crowder) is limited scoring wise so I agree with PhoSita that going small with a three guard backcourt of Smart, Bradley and I.Thomas is the best perimeter grouping.
I would go with Jerebko or Olynyk as my PF depending on whether Olynyk is being aggressive or not looking for his shot. I would choose Jerebko over Olynyk due to improved defensive capacity & consistency of play.