Cool tree. If it’s growing healthy and the roots are strong, I’d cut back pretty hard, but not beyond where there’s anything green.
Ideally, you could cut back beyond the intended silhouette so the tree could grow out to fill in the final silhouette. If that’s too much to cut for now, this can be done in stages.
Based on the branch you show, about half of the foliage can safely be removed from a healthy tree.
In general, it looks like the current silhouette is quite a bit larger than what you want to end up with - is this the case?