In particular order:
1. Janet
2. Britney
3. Beyonce
Janet is undeniably number 1 from these three women. Most of the times when people says Beyonce, its because she moves with the fans she uses, that creates illusion to move alot. After you take a second/third/fourth look, she doesn't move that much. All she does, whip her hair and moves her hands and legs, sometimes step on the floor little bit harder and let the fans do the rest.
To add, Janet and Britney is creative .Impressive choreo.