Yes, I do understand the importance of the men that operated them, as Bob pointed out, the specific subject here is the weapon they used.
I do think in modern warfare speers and the bow-and-arrow were outclassed even in WWII, say by the M-1 Garand and the 1911 45 auto, or the 45 Thompson, etc.
I think we all understand the bravery and tenacity shown in hand-to-hand combat, but that alone, being very basic by nature was not enough to impress those who lived at the Imperial palace in Japan.
On the other hand,if we want to focus on the men as well, then I vote for Col. Paul Tibbets, the driver of the B-29 that nuked Heroshima, as well as Major Charles W. Sweeney who comanded Bocks Car.
On the other hand, if we re-focus on the weapon/weapons system, then there is the B-29.
Eddie