From a technical standpoint, Greenland would be the best possible place in the event of a zombie apocalypse.
While the frigid temperatures and lack of plant and wildlife may seem inhospitable to most, the low population density of Greenland would make for a very low chance of there ever being a mass outbreak. If we take simulations of global world-ending diseases provided by Plague Inc. and real life scenarios such as COVID-19 we can see those who get sick often recover very quickly. Because of the cold temperatures hunting and gathering seem near impossible however fishing and ice fishing is a very good food source along with raiding small homes, towns and campsites for extra food is a wonderful idea.