Hi - I had a look at the Oakham transcripts and I can see a probable buriel for John
23 Sep 1834 John MYERS aged 80 Rutland Oakham, All Saints
giving a birth year around 1754, but there are no Myers entries in Oakham beofre the baptism of John & Sarahs son John in 1783. There are a couple Mears ones though, the closest being
4th FEB 1749/50 JOHN MEARS S/O JOHN/HANNAH OAKHAM
however there is also this burial
13th MAY 1759 JOHN MEARS SON of ANN WIDOW OAKHAM
I can't see a burial for Johns first wife Sarah (nee Osband) at all
there is this possible for Mary his second wife - she would be a bit older than him though
15th Jan 1824 Mary MYERS 88 Rutland Oakham, All Saints

DebbieG