F4U-4c, or.... F9F panther.. I dont know. It may have a sort of AHII effect if it were to be in Korea. Like the F86 and the Mig15 could be perked, and the F-84, F9F, and the Lavochkin La9 could be just regular planes. For attack roles, the F9F, F-84 and the F4U-4c would be best (F84 is a maybe, dont know too much about it)