Yeah, you've got to admit, the casting director for TOS managed to get some really terrifically beautiful women as secondary actors on the series.
And I second Marianna Hill (born Marianna Schwarzkopf, if you can believe it). Something about her persona combined with her dazzling looks... melts my heart every time. If there was just one minor female celebrity I'd get to marry, it would be her. No question.
There's also Gem, who gets frequently overlooked. I think she's quite ravishing, and shows a rather sensual manner during "The Empath".