Top strongest one piece characters 2015

Top strongest one piececharacters 2015 ------------------------------------------------------------------ It is too hard for me too rank. However, I think that my rank will be: 1. Gol. D Roger 2. White beard/Monkey D. Garp 3. Shanks/Monky D. Dragon 4. Blackbeard 5. Kaido/Big Mom 6. Raileigh 7. Kizaru/Sengoku 8. Kuzan/Marco 9. Fujitora/Sabo 10.Mihawk/Portgas D.Ace 11. Luffy/Doflamingo 12. Emporio Ivankov/Boa Hancock 13. Kuma/Law 14. Jimbei 15. Kid/Vergo 16.Zoro 17. Sanji/Caesar Clown 18. Pika/Trebol/Diamante 19. Don Chinjao/Sai/Cavendish/Bartolomeo 20. Smoker. How do you think?