I dono.. I see room for improvement, at least around the lower jaw. The level of surgery depends on how bad it is - got sleep apnea/small airway? teeth occlusion issues? TMJ? slide your jaw forward for your habitual bite?
You could get an SG and be done with it, maaaaybe jaw implants for what looks like a really high mandibular angle. I'd be afraid of a chin implant looking weird at certain angles b/c of those jaw angles. Not worth hypothesizing much more without at least a ceph xray.