Ewa Kuniczak, a wonderful friend and feltmaker from Scotland.
Birgitte Krag Hansen, a delightful creator of felt from Denmark.
Sue Pufpaff, our friend from Michigan.
Pat Spark is a feltmaker and teacher and runs the North American Felters Network
Alexander Pilin is a Russian creator of innovative felt fashions
Polly Stirling, of both the USA and Australia, developed the nuno felt technique to create light weight drapable felt clothing.
May Hvistendahl, a wonderful feltmaker and teacher from Norway (site not in English).
Jorie Johnson is an American feltmaker and teacher living in Kyoto, Japan.
Wendy Wiebe is a great feltmaker and raises Karakul sheep.
Festive Fibers; check out Nicole's great felted upholstery fabrics.
Ayala Talpai has published a great book on needle felting. 
Alana is a feltmaker whose work you should explore.