The phrase "famous preacher" refers to a religious leader who is well-known and widely recognized for their powerful and influential preaching or sermons. Full definition
Kudos to you Osteen for becoming the most famous preacher in America without anything more than common knowledge of Christianity. (religion.blogs.cnn.com)
Anne called for Phillips Brooks, the most famous preacher in Boston. (religion.blogs.cnn.com)
And before Perry goes on a kick that God has called him to the presidency, oh, it's shades of a very famous preacher who once said that God would call him home if he did not receive millions of dollars for his ministry, stop to think about that too. (religion.blogs.cnn.com)