Since the OP question was, what comes first, that I want another female, don’t really want a male, or that second female may eventually cause fights?
I would say, while fights can happen and even with a male it can happen that two dogs dislike each other enough to keep fighting it out, I would get a second female if that is what you want.
We were in that situation, preferring females and guess we were lucky never having any fights ever.
I know of several families that got two puppies, some not even from the same breed, talked into them by breeders pushing the old “they will entertain each other”.
Even when those were male and female, as mature dogs, several of those fought very bad.
It was not the sex, but the mix of temperaments and growing up without quite deciding who is boss that may have cause the trouble.
One friend here has two dog yards, one on each side of his house, because, I did warn him, he got two puppies to raise together.
They are male and female and sadly, they do fight if kept together.
They let one at the time in the house.
If you didn’t care, then yes, get a male.
If you prefer a female, I would get a female.