Who's the strongest among these in One Piece ?

1. Shanks
   
2. Blackbeard
   
3. Whitebeard
   
4. Kaidou
   

1.shanks
2.whitebeard
3.kaido
4.blackbeard

i believe whitebeard is stronger than blackbeard. only reason blackbeard killed whitebeard cause he was fighting all the leaders of the navy if it wasent for that blackbeard would of died