Well Aberkenfig is a small village, and co-incidentally enough, the Glamorgan Family History Society is based there. In regards as to what to look for, without disrespecting the place, there are a few pubs and a Spar! I went to school in the next village over and have a few friends there - quite a typical Welsh village in most respects.
Not a member of GFHS myself, and quite honestly have never visted it, but this seems like a good opportunity to suss it out and see if they have any info on your relative.
If he did work like this in the local community, I would assume that they must have some info on him there.
Don't think there are many graveyards in Aberkenfig - very few churches there, but a few in surrounding villages. Again, maybe the GFHS may have further details.