Hello,You are a great candidate for a chin augmentation surgery. It can be either done by bone sliding or using an implant. Your jaw line definition can be enhanced by lower face laser assisted liposuction. Laser has the benefit of providing a slight skin contraction over the worked areas to prevent skin loosing.
An improvement in the chin projection with a genioplasty and improving the area along the jawline towards the ear will achieve your goal and give good balance. Your lower jawline slope is genetic but can be enhanced.