Are they well fed and otherwise have their needs met? If so, then it will be smooth. Tangs are like the idiots sharing the house at Jersey Shore or Big Brother... feed them well, meet their needs and give them a good life and they will be well-behaved habitants... improperly stimulate them and under-meet their needs and they will act like azzes.
Generally, if you are feeding all of them well enough that they are fat and growing, then after a quick break-in period (hour or two.. day at most), they should all get along.
I have kept all of these tangs together with no issues... however, this was in a FO tank where I could feed them correctly. Tangs in reefs can be tricky since most owners won't want to put that much food into their tanks.