There's no way Pollock was a greater player than Kallis. Even on batting alone it's somewhat debatable, but Kallis as an overall cricketer leaves him for dead. Not sold on Hobbs either.
1. WG Grace (England)
2. Jacques Kallis (South Africa)
3. Don Bradman (Australia)
4. Sachin Tendulkar (India)
5. Garry Sobers (West Indies)
6. Andy Flower (Zimbabwe)
7. Shakib al Hasan (Bangladesh)
8. Imran Khan (Pakistan)
9. Richard Hadlee (New Zealand)
10. Bart King (non Test playing nations)
11. Muttiah Muralitharan (SL)
I think Kallis would have to open if you did it like that.