I know exactly what you are going through. Drake did the same thing. Drake would jump on everyone. He was only playing, but when a 75 lbs dog is all up in your face jumping on you, it is not really fun play!
We were old to push him away when he jumped. Tried and didn't work because Drake loves to play rough and he though we were playing with him. The next thing we tried that worked was when he jumped, we held his paws and just stood there for about 5 minutes (sometimes longer). So he was standing on his hind legs. We also were told to firmly hold his paws. Not to hurt him, but it would make him uncomfortable. He got tired just standing on his hind legs and them we let him go. It took about 5 or 6 times doing that and he hasn't jumped since!