Saruman.
I never read the book, but I saw the movies.
Once he was as great as his fame made him. His knowledge was deep, his thought was subtle, and his hands marvelously skilled; and he had a power over the minds of others. The wise he could persuade, and the smaller folk he could daunt. That power he certainly still keeps.
Saruman, also called Saruman the White, later Saruman of Many Colours, is a fictional character in J. R. R. Tolkien's fantasy novel The Lord of the Rings. He is leader of the Istari, wizards sent to Middle-earth in human form by the godlike Valar to challenge Sauron, the main antagonist of the novel, but eventually he desires Sauron's power for himself and tries to take over Middle-earth by force from his base at Isengard. His schemes feature prominently in the second volume, The Two Towers; he appears briefly at the end of the third volume, The Return of the King. His earlier history is summarized in the posthumously published The Silmarillion and Unfinished Tales.