I had to be the one
For me this is easy - '64 hands down.
When I was growing up my parents had a '59 Rambler, '64 Tempest and '69 Bel Air but the Azure Aqua '64 Bel Air 4-door sedan was always the family favorite and even almost outlasted the '69. The 283 from it currently powers my '64 SS until I can afford to put the original 409 back together.
Nothing against the others of course. The '58 is awesome, '60 too.
Brian