John Stockton. It isn't really close imo. He would murder today's NBA. No handchecking, pick and roll with space... it would be great.
Malone may be somewhat neutered with zone rules now, but was a fantastic passer out of the post. I'd love to have either really, but Malone's divaness (it wasn't that bad, but JS was the anti diva) is kind of where I'd draw the line. I just love the steadiness and even tempered Stock. Just did his job night in and night out and you never heard from him.