I agree he didn't invent the genre, although he certainly helped popularise and develop it.
"plenty" perhaps oversells the genre pre-Tolkien, and also afaik Jack Vance didn't start writing until well after The Hobbit was published, so I'm not sure he belongs on your list - William Morris would have been a much better example as a direct precursor to both Tolkien and Lewis.
"plenty" perhaps oversells the genre pre-Tolkien, and also afaik Jack Vance didn't start writing until well after The Hobbit was published, so I'm not sure he belongs on your list - William Morris would have been a much better example as a direct precursor to both Tolkien and Lewis.