F4H / F-4 McDonnell Phantom II. 1961-1996. McD submitted an unsolicited proposal to USN for an F3H Demon upgrade; an all-weather fighter, fleet defense interceptor, all weather, carrier and land based fighter armed with exclusively missiles. An internal cannon was added in E models. Served in USN, USMC, USAF.
Ekranoplan Casspian The Russian Tank-Ship-Plane. Not exactly a plane but still cool. It flies just over the water because of ground effect. So it can haul a heavy load very efficiently compared to getting it up to altitude. Or floating.