Voted Seven. Janeway... didn't care for the smoker's voice or the personality in terms of attractiveness. As a character, she makes for a pretty good captain. Kes looked better in the catsuit with 'natural' hair than the elfish look with meh costumes (Neelix's suits were far worse) but overall... meh. Torres was extremely attractive not just in look but also personality in some episodes (Season 3-5 mainly. Season 6, at times, she had a really ugly hairdo. Season 1-2 they were refining her makeup, eyebrows to look better). She's extremely competent in her field, keeping a ship's engines maintained on the fly, racking up more mileage than any other Starfleet ship under those conditions. We really got a good look at her personality and why she was the way she was. When her human side was showing, she was a tough match for Seven. Her quick temper got old (though it did seem to stem more from defensiveness or frustration than Kira, who was just naturally more hot-headed). We really got to understand her perhaps better than most characters. It kind of gets overlooked, but while the Doctor & Seven had the most development and growth or exploration, Torres & Paris were behind them on the second place spot.
Anyway, I voted for Seven. Seven obviously has the looks. Initially, back in 1997, even as a teen, re: her arrival I was like "Ok, she looks nice. So what? I can see that in other shows. Is she going to have a good character? Can she actually act?". I erred on the side of Kes at the time and did like what they did with Kes in late Season 3 (of whom we saw very little outside "Before and After" til Species 8472 made her powers flare out of control). Ryan won me over to Seven with her acting. Years ago, I saw some Season 4 episodes again and I had forgotten how vulnerable, insecure she played Seven in some of those episodes. The Borg superiority air from later seasons wasn't there. She comes off as being a cool-headed version of Torres. Extremely knowledgable in her field, using her personality as a defense for her sensitivity (replace anger with Borg aloofness). With Seven, we got an attractive female character with good acting (sorry T'Pol/Blalock) and character development/exploration/striving for humanity perhaps as good as Data's. She did really add to Voyager even if she didn't add to the ratings (yeah, I have all the ratings, did some comparisons. Take out "Scorpion, Part II" & "The Gift" and the big boost in the Fall 1997 episodes' average rating disappears and with/without it, the ratings didn't carry over to the winter & spring blocks of Season 4).
Seska is a younger, Cardassian equivalent of Kai Winn, lacking some of her characteristics, but replacing them with others (Seska is less naive, is a better schemer/planner). Samantha Wildman looked too much like a middle-aged suburban married woman to be considered really attractive (she's certainly not ugly. There's a whole spectrum of beauty).