If you're interested in using your medical skills to do some real "good" out there in the world, perhaps joining up for a stint with an organisation like Medecins sans Frontieres might be worth a punt for a change of scenery? That would tick number 2 and 3 on your list. Is a sabbatical possible as well? I know my employer has schemes in place which allow these sorts of career breaks.
If you're interested in changing careers but making use of your medical knowledge, you could do what I did and become a professional editor. I come from a research background, but there are quite a few medics (or ex-medics rather) where I work. Feel free to ping me a message if you'd like to hear more.
One of my friends packed up a career in IT to become first a paramedic, then a cycle paramedic, and she really enjoyed that, although the emergency services are super stretched and underfunded at the moment.