My choice: F-86 and F-86-D
Quite aside from the great appearance, the early day sophistication of the structural and aerodynamic challenges required to make it go like stink, were huge obstacles to overcome.
Some of the highest airspeeds of the era, swept wings, leading edge slats, etc, made it so complex for a new design. Factor in they had to make it go slow as well, for approaches and landings.
Some are more beautiful, but the -86 was one of them that led the technological path. Love the old bugger.
Patrick