There was clearly a wider MacCulloch cluster in Ballyartan, so care is needed to disentangle it. For example, one family comprised Hugh MacCulloch and Margaret Campbell, who had a number of children in Ballyartan from the late 1840s to the mid 1870s, one of the children was a Hugh who went on to be a clergyman, so not your Hugh, some of their other childrens' names (eg. John Mitchell MacCulloch b. 1860, Charlotte Matilda MacCulloch b. 1872, and Lucy Margaret Kyle MacCulloch b. 1874) are a reasonable match for the names and ages in the previously posted 1911 census return for house 19 in Ballyartan.
Another more promising family was farmer William MacCulloch and his wife Elizabeth Kells, who had a number of children in Ballyartan including Hugh MacCulloch (b. 1862), John MacCulloch (b. 1864), Robert Andrew MacCulloch (b. 1865), Sarah Matilda MacCulloch (b. 1867), and James Henry MacCulloch (b. 1873), that family would seem to be a reasonable fit for your Hugh, given the information in his 1917 civil death registration (54 years old and the informant was 'R.A. MacCulloch Brother') and the names and ages in the previously posted 1911 census return for house 16 in Ballyartan.
Aforementioned James Henry MacCulloch (b. 1873) was the resident of the previously posted 1911 census return for house 15 in Ballyartan.
