Wright Flyer
B-29 (nuked Japan)
U-2 (Cold War Symbol)
Concord
SR-71
Harrier (First real VTOL)
B-52 (if it ever *becomes* "history")
Me 262
X-1
X-15
KC-135


(there are lots of candidates such as the F-4, Mig-21, Zero, P-51,
etc. etc. but I think the above are unique and for that reason will
stand out)