Hanya Yanagihara gets my vote here for sheer numbers and gorgeous storage. I think only writers who are visual artists could be comfortable with the results after shelving by colour, don’t you, but nonetheless, Michael Chabon did it. (I was just as impressed at the existence of the summer home.) A fun article by Emily Temple at LitHub.
I organize mine into poetry, short fiction, novels, and non-fiction, then organize by “Best of” collections, and, in non-fiction, by subject (art, photography, biographies, gardening, animals etc) but I don’t alphabetize sections.