I'm not happy with my oblong face and gummy smile. Please help me improve my face. (photo)

hairline lowering with a conservative brow lift, rhinoplasty and chin implant are what would help you greatly. Should be done using the irregular trichophytic forehead incision which we developed. Make sure you look at the surgeons results to make sure they are natural And no scar is seen. 

Hello and thank you for your question. Based on your
photograph, you may benefit from a tip refining rhinoplasty. Your surgeon can
accomplish this by trimming, suturing, and reshaping the cartilage in your
lower nose. You may also benefit from a cephalic rotation of your tip to turn
up your tip slightly and a conservative dorsal hump reduction.  Fillers can also be injected to make your face appear les long.  Make sure you specifically look at before and after
pictures of real patients who have had this surgery performed by your surgeon
and not just a computer animation system. The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

Thank you for your question. A rhinoplasty can address the tip of your nose, as you indicated in your question. The distance between the nose and the upper lip, also called the nasolabial angle, is key to aesthetic beauty and should be between 95 and 110 degrees. I suggest that you consult with a board certified facial plastic surgeon. You will benefit from the in-person examination. 

Best wishes,

The combination of a rhinoplasty, cheek implants and a lowering maxillary vestibulplasty (gummy smile correction) would be a good combination as the first procedure. A subnasal lip lift can be done secondarily to shorten the distance between the nose and the lip.

A rhinoplasty and soem facial fillers can be a nice start for you.  Best to be evaluated in person. All the best.

If you want to address this without "jaw surgery"; that is maxillary impaction osteotomy, I would stick with the rhinoplasty alone.  You certainly could add fillers to address facial width, but this will not change the length of your face.