Arforce, I would also consider Clijsters as good or better a clay courter than Venus, and much better than Davenport or Sharapova. Honestly what have Davenport and Sharapova done to prove themselves on the surface? Clijsters has been to the finals of the French twice. Davenport to one semi in a long career, Sharapova one quarter where she was humiliated by a solid journeywomen. She also won her last meeting on clay with Venus in 2002, again before Clijsters rose to 2 in the world, and back when Venus was 1 or 2 regularly in the world.
No room for Henin and Clijsters? If at their best again, Henin imparticular, and even Clijsters, will have no problem booting Davenport, Sharapova, and probably Venus out of the room on clay.