I go with Jetfire, because...well...reasons. One of the most exciting and memorable TF toy purchases of my youth. Birthday money! Showed up to the toy store with my collected $25, had not heard of or seen him before, and was super stoked! Blew the whole wad on the one toy.
Of course later I was sad, confused, and let down (again
) when he showed up on the show with a different name and look. I get it now, and actually it was a smart way to get around the legal issues so this cool character could be in the show.
But, in my world, he was Jetfire first, so Jetfire he will stay.