Enterprise was indeed a one-ship class vessel, as with the
Langley
[the first US carrier] and the
Ranger
[the first US carrier built
entirely as such] most likely because she's the first carrier to be
nuclear-powered; construction costs prevented any sister ships [5 more
were planned].
I have an unbuilt 700
Yamato and 350
Shen zhen. I've been thinking how
Yamato would look if she had survived the war, or rather, if Japan had won the war, and
Shen zhen
would be configured sometime in the future, say 2015. As far as
creativity goes, you have a lot of choices, like if the US had joined
in the Six-Day War [using the atack on the USS
Liberty as a base] for tghe original configuration.
Wikipedia has a good article on
Enterprise which should help in your ideas for the models.