Since there are no front view photos, it is hard to judge whether jaw and chin implants will be good for you, however, if you really want a stronger, more define jaw angle, a jaw implant and conservative chin augmentation procedure are procedures that can help.
What can I do about my Undefined, Weak Jaw?
Hi, I have performed many Chin Augmentations using chin implants for over 30 years. From the photos, your chin is weak. A weak chin creates an imbalance making the nose appear larger, the mid face top heavy and the lower face look short that de-emphasizes the lips and allows early formation of a double chin. Chin augmentation using a chin implant will add projection to the chin creating harmony and balance to the lower face. I have found that placement of a silastic chin implant, through a small curved incision under the chin (also allows excess skin removal) to be very safe, quick, highly effective and far less invasive than a sliding genioplasty. I perform chin implant surgery in 30 minutes or less, often using a local anesthetic alone. In my opinion, you are a good candidate for chin implant surgery.
Hope this helps.