You're missing at least three. In Vortex #6 there were two fighter carriers. The German Graf Zeppelin class and a Manchurian design. I can't tell you any more because my copy is in storage. Also in Voyages #16 there was the Bunker Hill class which was termed as a cruiser. In the Yahoo 2300AD non-canon group some felt these were just modified Fort Bliss, which were themselves modified Kiev-class. The author even rang in a bit. I'd recommend perusing that group even though I don't always agree with everyone's assertions.