ORIGINAL: superstrutter
Give them the silent treatment. Don't call at all. On birds that are uncallable, and yes, they do exist, try to pattern the hens they are with and ambush them. Have you tried hunting close to the roost in the afternoon? Set up close to their roost in the morning and see whhere they are going. Calling at these birds may be futile and hurt you more than help you. It will take a few days to figure out a pattern, but if you do figure it out, the hens may bring the gobbler right into your lap.
I would put these birds in the uncallable situation. Like mentioned, i get pretty damn close to these birds. Also like mentioned, im gonna try and place a full strutter in their path this weekend with 3-4 hen decoys to try and lure the boss gobbler in. if that doesn't work, ill try the ambush tactic.