Its the 1950s and your Air Force will choose only one fighter for its core, choose!

a continuation of the last one but with an added caveat

the aircraft must have been in service for at least 5 years during the 50s, so no late 50s aircraft like the Phantom II.
But aircraft that preceded the 50s are okay, like the Meteor.

some random examples; mig-15, 17, saber, tunnan, fury, banshee, etc