I'm glad you included the picture of the B-47
Stratojet. When that plane was unveiled in 1947 it was like a plane 20 years ahead of everyone else: thin, sweptback wings and podded mount J47 jet engines that gave the plane a top speed of over 600 mph, a speed high enough that even the MiG-15 would have difficulty intercepting such a plane.
Indeed, the very configuration of the B-47 pioneered is still around with today's commercial jet airliners.
Indeed, the very configuration of the B-47 pioneered is still around with today's commercial jet airliners. It was very much the prototype for the 707 and the rest of the 7X7 series.
Speaking of prototypes, were the wings on the 367-80 "Dash-80" derived from the B-47?