Yates, Arkansas Black, and Callaway crab have been the principal apple varieties I’ve seen recommended for planting as soft mast trees here in the Southeast. The folks back home in AL at The Wildlife Group offer those and a number of late-ripening pears as well.
I have one very late pear selection that doesn’t even start dropping fruits until Thanksgiving, and will still have a significant portion of its crop hanging in the tree on New Year’s Day.
I also have a very productive native crab (M. coronaria/angustifolia/ioensis type) that produces larger-than average fruits that will last the entire winter on the ground - or until the deer eat them all.