This is a personal opinion question and no wrong answer. The Spitfires wing makes it commonly regarded as the most beautiful aircraft of WWII. The Corsair's inverted gull wing always does a little something for me. Some may like the 12 .50's on a B-17. IMO, these are mine.
#1 - Corsair
#2 - P-38
#3 - P-40
#4 - Fw-190
#5 - Me-262
plus many others........