If you got a good pick em up truck you could get a good long cable hooked up to it at the base and then make a notch on the top of the trunk and cut up all the way through from underneath. Then get in your truck and pull it down. Just make sure your cable/strap/ rope is sufficiently long so you don’t pull it down onto your truck or yourself and you are far enough away. If no truck use a winch after you make the cut to separate it from the rootball. Don’t get under it. Work slow. Work from a distance till it’s on the ground .
If my friend says, "we aren't doing this" so be it. It isn't in a traveled area of the woods and no harm. I am comfortable leaving mother nature take her course.
Sometimes that is the best option. After all I waited for ten years for the old White Oak to come down.