For me one of the most creative groups of people are writers because they can create entire worlds with only a pen (laptop nowadays I think) and their mind. The best part of the writers and their work is that they can share the results of their creativity with others via different medium like books, newspapers, internet and movies and so forth.
One of the most creative writer I’ve seen in a while is George R.R Martin (http://georgerrmartin.com/) who is behind the book and tv series of “Song of Fire and Ice” that have been a major success in many ways. He also looks like a really creative person!
Writers entertain, share knowledge, teach and record information for the future generations!