Apple is a lot like hard maple, and it'd work, though it's hard to source on a production level. If you can live with light color, Diospyros virginiana or persimmon, a common native, is ebony, just as hard as the best of them, but only pale gray. I've used Cercocarpus spp., AKA mountain mahogany, as well as manzanita, and both work really well and turn a nice creamy brown.
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