Both the Hellcat and the Corsair were outsnading aircraft that played ther roles successfully, it would be hard for me to choose between the 2. Thats why i voted for the Ki 84, good performance characteristics and a lot easier on the eye compared to the rugged but..chunky USN birds
Gotta go with the F4U, it outlived virtually all its contemporaries (except the P-51). Still fighting and shooting down jets in its twilight years and still flying military missions when supersonic aircraft had replaced its predeccessors in its dotage. What a plane!