Good/important poets who were or are also good/important (though not necessarily prolific) novelists? My small-hours list was a very short one for the adult canon: Sir Walter Scott, Emily Bronte, Thomas Hardy, D. H. Lawrence, Sylvia Plath, Philip Larkin at a pinch.
Within children's literature one could add RLS, Walter de la Mare, John Masefield, C. Day Lewis, A. A. Milne, Ted Hughes.
I'm sure I've missed out many obvious names. Whom can we add to both lists? (No peeking at reference books or Google-goggling, mind!)
ETA: Suggestions I feel foolish for not putting in the original list: Kipling, Graves, Wilde, Peake, HD, Bryer.
Oh, and Sir Philip Sidney, if Arcadia counts as a novel.