Congrats on the As!
I don’t think matching back the Southeast will be a problem for any of these schools. For UCLA, I believe 4th year electives are tiered grading (so that's something to keep in mind). Also, know that even though you have a "free" year that means that all pre-clinicals are crammed into 1 year which can be a pro or con depending on your learning style.
Stanford is also huge for clinical training so I don't think you'll me missing out. Tbh LA traffic is not any better than traffic in the Bay area, this is just a California thing. Also if your gonna go into academics, prestige and brand name definitely play a role for some things. And you said you had a mentor at Stanford which is already a nice start to networking.
Now, you said your family is closest to Pitt, having a support system close to home is a huge deal especially if you are thinking about starting a family soon after.
Overall, evaluate your costs (because a lot of money goes into starting a family) and if you get off the waitlists I think maybe Stanford > UCLA > Pitt.