By series:

TOS: Uhura - loved her skin and beautiful voice! TAS: It’s a cartoon, so no. TNG: Troi, especially in the purple and maroon jumpsuits DS9: Leeta - street smart and sexy as hell VOY: 7 of 9 - again with the jumpsuit (seeing a theme yet?) ENT: Hoshi, doubly so in the alternate universe DSC: Detmer. The hair and heterochromia are sexy. STP: Seven again. She’s aged so beautifully. SNW: Chappel - action packed beauty