Sounds more like he's protective of you than aggressive (which is a fine line..still is behavior that needs to be stopped).
Is he neutered? If not, I'd get that done first.
The only suggestion I have would be to just gate him off or put him in a separate room when strangers or children are over at your house. And, look into a behavior trainer/specialist for him.
Welcome to YT! You'll get a lot of help here from some very knowledgeable people.
__________________ Terri, proud mom to Mandie  & Shelby-Dale  |