I don't think we need another striker. Certainly not a 1st choice 1.
We had 2 strikers score 15 for the 1st time in 30 years and neither of them took a penalty. That's a great return. On top of that, our midfield was useless. We had 5 defenders get nearly twice as many assists (16) as our entire midfield (10).
I actually think with a proper midfield, they could do that again, maybe even more. Maybe that's just overly optimistic.
If we did manage to sell Tosun and Sandro, I would consider a short term contract for Ibrahimovic if he doesn't resign with Milan, as someone to have around the squad, for the young strikers we have to learn from, plus he is a born winner. Or maybe another young talent to line up as a potential future star in the event 1 of the 3 leaves. But in terms of options, I'd be happy to go with what we have and see how they develop.