I have not killed off Sybill Trelawney, as no one else was interested in Divination.  Firenze is also still alive, to the best of my knowledge.  As for female professors, we have McGonagall (headmistress), Sprout (herbology), possibly Trelawney (Divination), Vector (Arithmancy), Babbling (Ancient Runes), and Sinistra (Astronomy).  We also have Madame Pomfrey healing various wounds.  Many of these roles are replaceable if there is interest.