In this game it does not matter at all how ridiculously tiny the technical stop airport is. So long as the runway is long enough you can make a pit stop there. Here are two fun options that I could suggest. Both airports have runways long enough to accommodate a Boeing 747-400.
BKK-LAX nonstop: 7186nm
BKK-PKC-LAX: 7187nm (1nm more)
Maximum range required: 3601nm
Petropavlovsk-Kamchatsky is the capital of the Kamchatka Oblast in Russia and was the base of the Soviet Pacific fleet during the Cold War. The entire peninsula was off-limits to foreigners (and even Soviet citizens not affiliated with the military). In 1983 a Korean Airlines 747 was shot down over the Peninsula after accidentally straying into Soviet airspace. I hope Sami did not model this part in the simulation
BKK-CDB-LAX: 7189nm (3 nm more)
Maximum range required: 4956nm
Cold bay is a village of about 200 people located on the Aleutian peninsula in far Southwest Alaska. Your aircraft would be the largest aircraft to regularly visit the airport and, coincidentally, have the capacity to evacuate the entire village with seats to spare
The runway is so long because it was constructed during the Second World War when Japan invaded the Aleutian islands. In reality you would be hard pressed to find the equipment necessary to refuel at the airport here but why not get a kick of flying into the Alaskan bush on your way from Asia to North America...