Taking just the top 1000 works of fiction in English at Project Gutenberg, here’s a list of authors who have more than 2 titles on the list, ranked by the average rank of their work. The number of works they have in the top 1000 is also given.

Obviously, authors are penalized substantially by having even one weak success among their other titanic successes. I guess you could look at it as a prediction about how likely someone would be to enjoy literally a random popular work by a prolific author, but really, this is just for fun.

61.4	7	Austen, Jane
95.3	3	Joyce, James
97.2	6	Dostoyevsky, Fyodor
123.0	3	Brontë, Charlotte
146.9	11	Montgomery, L. M. (Lucy Maud)
202.1	20	Dickens, Charles
242.5	4	Forster, E. M. (Edward Morgan)
252.8	4	Fitzgerald, F. Scott (Francis Scott)
256.3	10	Dumas, Alexandre
258.0	4	Barrie, J. M. (James Matthew)
265.5	4	Defoe, Daniel
273.2	6	Potter, Beatrix
302.2	4	Dreiser, Theodore
312.6	12	Tolstoy, Leo, graf
313.2	4	Orczy, Baroness Emmuska
317.0	4	Flaubert, Gustave
326.0	10	Alcott, Louisa May
327.8	8	Eliot, George
331.2	18	Baum, L. Frank (Lyman Frank)
342.0	4	Maugham, W. Somerset (William Somerset)
348.1	9	Nesbit, E. (Edith)
365.1	11	Kipling, Rudyard
365.5	8	Gaskell, Elizabeth Cleghorn
373.2	4	Woolf, Virginia
376.1	16	Hardy, Thomas
376.5	4	Lawrence, D. H. (David Herbert)
390.7	7	Melville, Herman
399.6	5	Hawthorne, Nathaniel
413.0	4	Cather, Willa
416.3	10	Wharton, Edith
416.5	4	MacDonald, George
417.4	8	Chesterton, G. K. (Gilbert Keith)
422.6	14	Verne, Jules
432.9	25	Burroughs, Edgar Rice
445.7	23	Doyle, Arthur Conan, Sir
451.0	6	Cooper, James Fenimore
456.6	8	Burnett, Frances Hodgson
458.3	7	Stratton-Porter, Gene
461.0	3	Galsworthy, John
466.1	14	Conrad, Joseph
480.0	3	Shelley, Mary Wollstonecraft
493.0	4	Stoker, Bram
493.9	19	Twain, Mark
494.6	5	Southworth, Emma Dorothy Eliza Nevitte
494.7	19	London, Jack
495.1	11	Stevenson, Robert Louis
497.2	4	Grahame, Kenneth
500.0	3	Norris, Frank
513.0	3	Smith, E. E.
515.0	3	Lewis, Sinclair
523.7	3	Porter, Eleanor H. (Eleanor Hodgman)
525.3	15	Wells, H. G. (Herbert George)
534.7	6	Tarkington, Booth
536.2	4	Jerome, Jerome K. (Jerome Klapka)
538.5	19	James, Henry
563.8	4	Buchan, John
569.8	5	Henry, O.
582.9	18	Wodehouse, P. G. (Pelham Grenville)
583.8	32	Trollope, Anthony
588.6	5	Leblanc, Maurice
588.9	14	Grey, Zane
591.0	5	Thackeray, William Makepeace
593.2	6	Sabatini, Rafael
594.4	5	Norton, Andre
597.9	8	Balzac, Honoré de
603.0	3	Chopin, Kate
616.5	12	Scott, Walter, Sir
616.6	5	Hope, Laura Lee
617.0	5	Sidney, Margaret
622.8	4	Gissing, George
623.7	6	Piper, H. Beam
637.0	3	Marryat, Frederick
661.0	5	Dick, Philip K.
665.8	20	Haggard, H. Rider (Henry Rider)
675.5	4	Wright, Harold Bell
681.6	20	Collins, Wilkie
689.8	4	Morris, William
690.0	3	Terhune, Albert Payson
699.9	9	Burgess, Thornton W. (Thornton Waldo)
709.0	3	Lytton, Edward Bulwer Lytton, Baron
713.0	3	Howells, William Dean
719.8	19	Henty, G. A. (George Alfred)
729.5	4	Chekhov, Anton Pavlovich
732.7	3	Seton, Ernest Thompson
735.0	3	Saki
736.2	4	Brown, Charles Brockden
779.0	4	Rohmer, Sax
791.3	3	Hornung, E. W. (Ernest William)
793.8	8	Rinehart, Mary Roberts
807.3	3	Freeman, R. Austin (Richard Austin)
814.2	4	Bruce, Mary Grant
825.7	3	Ferber, Edna
833.3	3	France, Anatole
861.2	5	Appleton, Victor [pseud.]
878.3	3	Meredith, George