Growly Bear

I might have mentioned already but I will mention it again. Atlas is just about the perfect dog. He loves everybody and want to everybody to love him back. The only complaint I have is he barks at lots of stuff. Is I am a protector bark And his "I'm so glad to see you bark" are the same the only difference is his tail. It always starts out with his protector bark and his tail goes straight up and when he sees who it is his tail starts to wag but his barking stays the same. I'm trying a new strategy to help me get a handle on this.
Now when he barks I tell them Barkey Barkey is bad and scold him. He usually comes over and lays act of my chair and bark some but not very much. I keep telling him Barkey Barkey is bad and he seemed to understand. I've started calling him my little growly bear and he seems to really like that. When he growls I tell him Bob a lovely growly bear. This week it is started to seemingly have an effect on them but who knows.
There are things I let him bark at and some I actually tell them to bark at. I think it's okay to bark at the UPS guy or the FedEx guy because they are not regulars. He's not supposed to bark at the mail person but usually does. Sometimes he doesn't though where he just gives a couple halfhearted wolfs and lays back down on the couch.
He loves it when my wife comes home and he follows her around wherever she goes. I call him her little shadow and she is always tripping over him. For a 90 pound dog he is very quiet and when I'm on the bed at night with him you will disappear going to living room with my wife. I really realize he left. We call him the ninja dog.
I told my wife jokingly that my biggest fear with teaching him to be a growly bear is that a black bear mama might walk by and think he is one of her cubs since he is black and about that size. Of course there's little chance of that concern black bears anywhere within 100 miles of us..