Yes, Drs. Schwartz and Lekovic are the only neurosurgeons at the House Clinic. I believe they can be partnered with any neurotologist. Drs. Slattery, Brackmann, etc. are neurotologists, so they perform the opening and closing, which is a bit more than assisting. Although removal of the tumor is probably the most critical part (which is what the neurosurgeon does), the opening/closing is really just as important since you want to avoid infections, headaches, CSF leaks and other complications.
Translab provides the best view of the tumor to minimize facial nerve damage, but does not preserve any hearing. Middle Fossa may provide the best possibility for hearing preservation. You should discuss the pros and cons of each with your physicians since each case differs. Also, many factors can contribute to the recovery time, but the general rule of thumb is that the smaller the tumor is the quicker the recovery.
I would certainly recommend you ask to speak with Dr. Schwartz for a neurosurgeon. My personal opinion was that Dr. Brackmann was a bit senior, but my understanding is that he is a very good physician with a vast amount of experience. I and many others have had a very good result with Dr. Slattery. There is no reason you can't speak with all three.