I thought the F4 Phantom was the first. 
i don't believe so.
i would have to go out in the garage, and climb up in the rafters to find the book, but i recall reading that the eagle was the first with the power to weight ratio to allow it to go supersonic immediatly after leaving the ground.
no wheels up, accelerate a little, then pull nose high. wheels up, point nose straight up, and continue to accelerate.
it was built because the air force thought that the foxbat was intended as a fighter, whereas it was actually an interceptor.