Having been down this road before, were it my tree, I would chop it as
@Alain suggested - upper right branch becomes the new leader. Sometime in May or early June when the first flush has been hardened, cut back the leader. Don't cut anything else. This ought to give the tree many new low branches.
Just after leaf drop, I would bend any available branches and wire them into position to make approach grafts in positions (in spring 2017) on the trunk that you either want a branch but don't have one or to just to add more lower branches - these will help thicken the portion of the trunk below faster than the part above (once taken, of course). At this same time I can also wire young branches to point them where I want them to go or to give them some movement (not let anything be straight as an arrow). Since I have a tree (yours) with a nice smooth curve of movement, I want the branches to have similar smooth curves, so I will likely have a lot of wiring to do this coming fall (2016).
Then I want to continue grafting and heading it back by pruning harder the higher up the tree (i.e, making a very exaggerated Xmas tree) until it is getting near the proportions I want. It should also have some nice taper with little in the way of scars. At this point in the future, I would start eliminating extra branches and pruning hard to build the branching I want.
