North of the city I'd recommend Burlington, Lexington. Woburn, Reading, Wilmington, and Wakefield.

Concord or Waltham slightly west of the city may be good options too.

Shrewsbury, Salisbury, and Worcester might be a little further that what you want as those places can be further than 1hr from the city depending on day/time. For example, during the summer, you may not plan on going to the beach but many people are and that creates a lot of traffic on weekends going north/south.

I think it will come down to what hospitals you want to work at as well, as a long daily commute can be draining. Check Google maps at peak commute times to potential hospitals from the potential towns you want to live in.