What are the options to "fix" my unsightly smile?

Hi I'm very self conscious about my smile and I'd like to know what is possible to do in order to get a beautiful smile. I've been to multiple maxillofacial surgeons who told me they would add 1.5 to 2mm to my upper jaw but with questionable results. One of them told me that altering the soft tissues would be necessary to get decent results combined with a bimaxillar osteotomy. Good news is an orthodontics treatment woudnt be mandatory for a 1.5 mm osteotomy. Thanks for replying Best regards!