I would like my chin/jaw to be more prominent - What would be my best bet for achieving the desired results? (Photos)

These photos do not offer enough information for a good advice. However, it is very likely that chin augmentation with implant would be a good solution. In person or teleconference consultation with a board certified plastic surgeon with good reputation in chin surgery would give you a chance to discuss more details and possibly have 3D simulation. Good luck.

Thank you for posting your question here!My answer will based on the limited information and data provided, for a detailed and bespoke plan please consult with your plastic surgeon.
The answer will depend on how invasive and permanent of a result you are looking for. additionally an in person consult will usually provide more insight on what needs to be done (in certain individuals it is the deeper structures in the neck that cause the angle to look more obtuse and in those individuals a neck lift is the answer , others it is supra-platysmal fat which can be addressed with lipo , while in others it is just the bone structure "recessed chin etc").
from your pictures it looks like you can probably achieve your desired results (sharper jawline and chin elongation) through either implants or filler , implants tend to be more permanent but more invasive while fillers are less permanent but less invasive , each carries it's own benefit and potential complications, make sure to discuss those issues with your plastic surgeon so that they can come up with a plan that will work for you!I hope this helps, Best of luck!