Turiaf would be my guess. Similar strength/weakness profile to JO (minus some of the post defense, plus a little bit more mobility). The French Connection with Pietrus probably doesn't hurt.
We're in a position to offer him a lot of minutes, probably moreso than any other contender.
My only beefs with Turiaf are that he won't solve our rebounding problems, and he probably won't stop small-ball. Given his offensive limitations, I don't think Doc would play him with Stiemsma -rather he'd replace Stiemsma, nor do I think he'd play him the 30ish minutes he'd need to to keep Pietrus/Pierce from seeing so much time at the 4.
Thus we'd be adding a small net upgrade over Stiemsma (better overall defensive player, better finisher in the paint; lesser rebounder).