Delta wing aircraft. The USAF had 3, the B-58 Hustler, and 2 fighters both were in the start of the century series. If I remember right they are the F102 and the F 106. France, and at least 2 other countries also had delta wing aircraft. I'm not sure if any nation has them at this time. You might try to search military aircraft of the past and also check the military flight museums. As to what is the strongest military aircraft, it is very debatable with the C47, Mig 17, F 84 and the B52 all having some virtues for that title. Also a couple of Swedish design fighter should be included. I was not aware of any V shaped tales at all except the SF series about 20 years ago.