Would help to know your age, how long your hair has been like that. How long if you have discontinued finasteride / minoxidil if that's the case etc. Since the more recent the easier it is to reverse the thinning. I personally think you'll be able to regain some ground but if its to your satisfaction is another question. Normally we always want the best result but that result is very rare without the use of a Hair Transplant, I can't say how well its gonna fill in if you start using the Big Three because everyone experiences different results. All I can say is that your hair is only going to get worse if you don't get on them, so its up to you do you want to continue fighting or do you want to just give up and accept male pattern baldness? No one can tell you if it'll save it or not; not even a doctor. Take care and good luck.