Well, there is almost no answer. Kushina has strange chakra and is a direct dessendant of the 1st hokage. Also it depends on whether kushina has the kyuubi inside her during the fight. If she did, id say kushina.
Its not true that the sharingan derived from the rinnegan. If you would pay attention youd know that the rikkidou sennin's eyes he had the juubi eye. Which is the sharingan and the rinnegab mixed together. Thats why when madara obtained the rinnegan from pain, he gained another path to the moon...
Hinata. All Hinata. But what I hate is that after the pain fight and Hinata declared that she loves him they did nothing with that. They acted like nothing happened!