Wolfgang is right, Knud Rasmussen has to be the most famous Greenlander (or the least unknown). The most famous Greenlander still living in my opinion is a man called Rasmus Lyberth - and it's folk, because he is a singer! Although he sings in Greenlandic, it is said of him that his way of singing is so intense that you can understand the meaning of the text even if you don't understand the language! That sounds far-fetched perhaps,but there is some thruth to it, he really is a fabulous singer. Not to be missed if you ever get a chance to hear him.