I believe you should have jaw surgery with proper presurgical alignment of the teeth with orthodontics.
Do it right first time and be over with it.
The position of the teeth affects the appearance of the chin and the profile. If the lower front teeth are tilted backwards, the teeth are not able to support the lower lip properly and any surgery on the chin to reduce it won't look natural. "Jaw surgery" is better to obtain a natural balance. If the chin needs recontouring as well, it can be done, talk to the surgeon about it.