Here is a thought from the veterinary world. (Not always publicly known, since we don't always have responsible owners.)
In general, it is now known that keeping your male dog intact until full sexual maturity actually decreases his chance of prostatic CANCER in his later life. (This isn't to say he wont get an enlarged prostate, but the chances of it becoming cancerous are MUCH less.)
Sexual maturity in large breeds is 2 years of age up to 4, depending on the genetics of the dog.
Not neutering your male early will also help to control excessive growth. Mr. Frodo was a HUGE pup. At just 2 weeks, he was 5 1/2 pounds. (No teeth, and eyes were still shut) He had a shattered hock that we put into a cast. I was concerned that he would become a big dog with a horrendous hind end, and I wanted to give him every chance to grow as sturdy as he could. He is within breed standards today, at a year and 1/2. (84 pounds and much shorter than I had feared.) His muscle mass is beautiful for a dog with a fused hock.
I am going to neuter him. I have a breed bitch in this house, and although he has NEVER been a rude boy, I don't ever want to take that chance. (And playing the separation game is a pain, if I know I'm not going to breed him!
He will see his second birthday before I go there.
Frodo has never been a bad Boy, because he is not allowed to be. Sniffing, humping and dominance get sharply corrected in this house. (Thank God for the bitch pack!
He is expected to sit like everyone else for nails, grooming, etc. He grumbles, complains, and sometimes cries like a baby, but he is expected to behave.
If you are willing to be the boss, then I think you will have no problems.
If you can reduce the chance of cancer, and then wipe out prostate problems when you neuter after 2, all the better.