We already have Seven of Nine. There's really no need to wonder.
That would work if Seven of Nine were the same character as Data, only female. But she is not. They're not even the same species, have completely different backgrounds, and want different things. Data wants to be human right from the start and thinks that there is nothing better than being human, Seven starts off by thinking there is nothing better than the Borg collective and not wanting to be human at all.