Anyone else think Allison Mack might make a good Federation caption? In the style of Ezri Dax. And, assuming that de Boer isn't available, or has aged more than Ezri in the interim. (She's 40, and Ezri isn't.)
I know she played as a high school kid in much of Smallville, but recently she's dropped the adolescent voice and attitude and begun acting as an adult.