O'Reilly like Sutcliffe here.
Thinking about Kallis, would he make the W.I team over Headley? Think as batsmen we date them really closely, and while I believe that Kallis is the 3rd most valuable (not best) cricketer ever, the rolls that makes him valuable are literally being filled by the only one person who did them better.
So my list is very similar
Hobbs, Hutton, Bradman, Richards, Tendulkar, Sobers, Smith, Lara
Gilchrist
Marshall, McGrath, Hadlee, Warne, Steyn, Ambrose, Imran.
Kallis is close, and this will surprise and get me labelled a homer, but Garner.