Other physician shift workers are hospitalists, intensivists, laborists (delivery babies), neonatologists, besides ER docs. But you could also consider working for a mega group of physicians where call is less frequent. Or a walk-in clinic, public health clinic, family-planning clinic, VA clinic, or college health clinic where there is no call.
Family docs and internists in my area take call by phone, but have ER docs and hospitalists see anyone with night time emergencies or needing admission.