Well, You need to know max g and airspeed, the so called V-n diagram.
Dive bombers has high max G but them use dive airbrakes to control airspeed. Every aircraft has a Vne (airspeed not exceed), for the F4U was 787 km/h, for the last model Zero A6M5c was 740 km/h. The thickness of wing skin is a primary factor for max G and Vne and the F4U has fabric outer wing skins. More thickness means heavier aircraft (lower performance). Japanese did not have so powerfull engines like the PWR2800 until the end of the war, so they should control the weight, Zero and other japanese aircraft did not have high Vne.
Il-2 Sturmovik was a very strong aircraft, but it was because armor plate, outer wings were wooden made, and it should limit his max G.
In modern aircraft, F-16 has a maximum G of 9, F-18: 9.6, Mirage M.III/V: 7, A-4:6.
WW2 aircraft sometimes has higher max G, but it is interesting because pilot did not have G-suit, and trained pilots could not resist 5g for more than some seconds without G-suit.