I'm a low trail convert, the Fuji S-12 is a natural in that regards. You could put 650b x 42mm tires on it no problem, and it would take all of the gravel you could throw at it.
Others might be faster on pavement, but Eroica is about climbing gravel hills, so I'm told.
That said, any bike on your list could get you to the finish line. It's more the motor than the bike.
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If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.