A wide angle lens is just a tool. I would expect most photographers would use a variety of lenses, so following or studying specific photographers might prove fruitless.
I guess wide angle photography is most common in landscapes, photojournalism, travel and often street photography.
You could start with some masters in genres which make more use of wide angles:
- landscapes (Ansel Adams, Galen Rowell)
- street (Henri Cartier-Bresson, Jay Maisel)
- photojournalism ( Robert Capa, Philip Jones Griffiths)
National Geographic produces a rich variety of all sorts of photographs, environmental portraits, landscapes, nature. Much of it utilizing wide angles. (there is even a book! - see comment from Itai below)
You could search on 500px and Flickr for "wide angle", or browse through categories such as landscapes.