When I was a kid I always thought the SE-5A was sexy but for best all-around use learned tha Pfalz series was best. Anthony Fokker's memoirs say the D-VII was a hurry-up job to meet absurd specs. He didn't think anyone could fly it. But it was breathtaking in action.

In terms of WWII, ah, if the P-40 had ever been supercharged as designed! Best was the Skunkworks P-38 but it was huge! Probably the later Corsair fulfilled mot necessary all-around tasks.