Is it possible for me to achieve a slimmer face with a more defined jawline? (Photos)

Despite being slender, my face has always been round and it often appears as though I have a slight double chin whenever I smile. My face seems to blend into my neck when I smile. I prefer the look of sharper jawlines, but I'm afraid that jaw filler would make my face appear wider. Would I benefit from submental liposuction, buccal fat removal, V-line surgery, chin augmentation, or jaw filler?