There is no debate here. B'elanna.
Sadly, to me, even that picture proves my point;
All that makeup ruins Dawnson's potential to be sexy for me =(.
She can't even pull off the emo girl well with that makeup.
Again, throw her in Charmed and she would have been in tight competition I bet. In Voyager, with the role she had ... It was all too forced.
After a fashion, 7 of 9 was all too forced too, but the one advantage is, you can point to any number of studies that would suggest a lot guys have abduction fantasies. Heck, the proof is in how many trek fan stories there are out there for 7 of 9 assimilating someone through sex compared to B'Ellena beating someone into submission; not that I've looked for these things, but sadly, unfiltered searches on Google for things like [Borg +"Seven of Nine""] bring up some scary things, lol.