Peter Pracownik is a citizen of Britain and has been quite successful as a fantasy artist since the late 1980's. His work includes a t-shirt and poster design for the Greatfull Dead in 1993, a designer of tarot cards for various companies and various other poster projects. He also is an artist with a great deal of knowledge of mythology and lore. Peter currently runs a gallery with artist Nicola Clare Lyndon in Tintagel called Another Green World.
Peter also is an artist who paints vibrant images of Tolkien's world. You can find his website The Enchanted World of Peter Pracownik has various images of his work. View the link to the Print Bar and you'll see the categories of all his work, Tolkien among them.