What does one do when, from the long list of LOOTM possibilities, nothing speaks out at all? Go BIG!
Republic Aviation had a designer who was tasked with developing a replacement for the Seversky P-35. Kartveli* came up with the P-43 Lancer that begot the P-47 Thunderbolt. It is the P-47 that finally spoke up as a LOOTM.
The P-47 was a big fighter in its day, and remains one of the larger single-engine piston fighters ever fielded by a military air power. With 2000+ HP (some later models could produce 2800 HP!) from the outstanding Pratt & Whitney R-2800, eight .50 caliber machine guns, and an unnatural ability to absorb punishment and damage, the Thunderbolt became an iconic aircraft, helped by the fact that some many countries operated them.
The May LOOTM
The Republic P-47 Thunderbolt--speaking to you.