That depends on what criteria you are judging the aircrafts. If going by plane characterstics, then F4U Corsair would be the victor. Going by number of kills, the Hellcat deserves a better position in the poll.
The F6F Hellcat accounted for more kills than both the F4U Corsair and F4F Wildcat, and shot down Mitsubishi A6M like flies. Yet it's behind F4U in the poll?? Wah?