I perform regularly all kinds of genioplasties, not only sliding genioplasties but also one, two and three-dimensional augmentation and/or reduction genioplasties, plus other custom designs; in other words, I know well what I am talking about. Your case is the among the best you can meet doing chin surgery to perform a three-dimensional osseous reduction. That is the name of the procedure you are an optimal case for, since you need: massive vertical reduction, important horizontal narrowing and a moderate anterior deprojection/reduction of your chin dimensions. This is an awesome, lifetime lating, stable and safe procedure, which notwithstanding needs very accurate preoperative antropometric planning, desing, discussion and a brilliant execution, a technique full of creativity and good aesthetic judgement requirements. Additionally I'd sugges rhinoplasty, specially to raise the low radix and make a better straight profile; other enhancements on the nose as per your request. Feel free to request any additional information from me.