Correction to my first post. Mansell Gamage I don't think has a churchyard.
This is from Hereford record office catalog:
They hold burial records for this period for
Kinnersley
Mansell gamage
Staunton on wye
On microfilm
Credenhill
Mornington
Originals only, not filmed, you may need to book to see these.
Letton
Mansell lacy
Weobley
No records shown, they may be at the church still.
Byford is a parish not on your list, records have been filmed at Hereford record office.
A general observation the most likely places are the parish he died in or a family grave in the parish he was born in.
Mike