If there that tight of a group and you know were they roost try and scatter them right at daylight before flydown. I don't mean flush them all in the same direction I mean separate the hens from the gobblers or better yet all 4 separated. Then you should have a good chance of calling a gobbler in. I once had two gobblers that would not respond to hen calls but ran off a gobbler I was working more than once. I finally roosted them one on each side of an old grown up fence row I intentionally walked right at one gobbler until he flushed and sat down gave a few gobbler clucks and killed the other gobbler 10 min later. The next morning I found and killed the second gobbler on the same fencerow they were as close to identical as a turkey could be more than likely two year olds from the same nest that stuck together. They did not seem interested in hens but ganging up on other gobblers.