Best male player to never win a slam, covering the entire open era

Please delete (as I can't do it myself). I forgot to click the poll button.

I may resubmit the thread tomorrow. Choices, in my view, should be Okker, Curren, Leconte, Mecir, Pioline, Martin, Rios, Philippoussis, Rios, Corretja, Nalbandian. Maybe Metreveli or Solomon.