How can you pick out any one from the list? Many of them couldn't have done anything on their own as a single weapon system can't win a war on it's own.
Individual weapons don't make a huge impact in general, although the atomic bomb has changed all of that. However, I went with the C-47. World War II was won through codebreaking and logistics, and the C-47, the jeep, the jerrican, the deuce-and-a-half ton truck, the Liberty ship, the LST, modular shipping, standardized parts, were decisive. So were electronics, TOT barrages, radar and radar jamming, escort carriers, and corvettes.
I went with the T-34 an exellent tank. Cheap and easy to mass produce and with good armament a 76.2 mm gun and armour ranging from 0.79 inches to 2.56 inches. It was also a reliable tank for the hard terrain of the Eastern Front. In Stalingrad by Antony Beevor he mentions an encounter between German panzers and the T-34 with the German tanks pouring shot after shot at the T-34 and not one piercing.
None on your list. Ask any Veteran what they feared most, the answer you are likely to get is the 88, the most feared gun of WW2. a small thing, but had a vast influence in battle. Sapper
The 88mm was,nt an allied bit of kit! , but yes, the 88mm was brilliant at its job, along With the Tiger 1 and 2 the Panther, the Fw-190 Me-262 etc All the above were just not made in enough numbers Paul
The one "weapon" that I can think of that helped to end the war in the Allies favour isn't listed... ...the weather!!! On multiple occasions the weather turned out favourable for the allies and either stopped Axis attacks/invasions, severely hampered them,etc etc. Dave.