I would contend that Tolkien's legendarium is Germanic in its nature and not Celtic or Finnish <<although there are influences of the Finnish and Celtic languages on the constructed languages Tolkien designed, and so also Ancient Greek and Latin>>, but Finnish and Celtic mythologies were not employed, but rather Germanic Scandinavian mythology and Christian mythology. The book's literature is vastly influenced by Old English and Renascence and Baroque English literature periods. So, the answer is no. D&D is an amœba of different influences that was heavily influenced by Tolkien's works and many other tales and mythologies of Europe, but has no profound works of literature.