I do not think it is a Bradford pear.
It could be any number of flowering fruit trees, apple, cherry, crab apple, another pear or peach.
If the top 85% is dead and you are left with basal sprouts, there is really no "healthy" in that statement. It just means that the tree may be trying to sprout like crazy in an attempt to save itself. Or it could be a grafted tree. The base is sprouting while the grafted top is dead!
Remove it.
