I've been actively seeking out uplifting books and stories by contemporary physicians, for that same reason. /God's Hotel/ by Dr. Victoria Sweet was really great for me. Describes the downsides of the changing face of medicine, but also depicts someone actively choosing the life she wants to live as a doctor.
There are also some stories of some pretty cool doctors living good lives in Gawande's /Being Mortal/. Richard Selzer has some good stuff too, altho his work is old. Oliver Sachs, too, obviously. /Mountains Beyond Mountains/, of course.
A lot of what I notice, though, is that the happy writers are all doctors who have found a different perspective to bring to their work. Maybe they like to study ancient medical remedies, or translate their experiences in a way that could be meaningful to non-physicians, or they have a greater vision of how we should be as people and want to share that. Whatever it is, I see a lot of happiness in the writing of people who stay curious and actively engaged with what they're doing. That gives me hope.
I'd love to find more books like that, btw, if anyone has suggestions.