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