Elwin Ransom
Elwin Ransom may be based on C. S. Lewis' friend J. R. R. Tolkien ("Elwin" means "Elf friend" in Anglo-Saxon), though he seems to have autobiographical elements. In "That Hideous Strength" Ransom, with his royal charisma and matter-of-fact breezy acceptance of the supernatural, appears less like Tolkien than like Charles Williams (or some of the heroes in Williams' books).
On Fairy-Stories
Tolkien was among the pioneers of the genre that we would now call fantasy writing. In particular, his stories—together with those of C. S. Lewis—were among the first to establish the convention of an alternative world or universe as the setting for speculative fiction. Most earlier works with styles similar to Tolkien's, such as the science fiction of H. G. Wells or the Gothic romances of Mary Shelley, were set in a world that is recognisably that of the author and introduced only a single fantastic element—or at most a fantastic milieu within the author's world, as with Lovecraft or Howard. Tolkien departed from this; his work was nominally part of the history of our own world, but did not have the close linkage to history or contemporary times that his precursors had.