Hi Philippa
The Harrow Weald registers deposited at the LMA are
baptisms from 1838
marriage and burials from 1845
The other ancient churches in the area with registers that cover the dates you are looking for are
St John Stanmore from 1599
St Lawrence Stanmore from 1558
St John Pinner 1654
He could well be buried on the Hill, unfortunately the microfilm of the registers needs careful and meticulous study, I only have 30 mins at lunch-time, which is just not long enough to get to grips with.
Even with my limited geographical knowledge of the area , I would plump for Stanmore first if he's not at Harrow.
I know they have many transcriptions at Harrow and biographies of the 'rich and famous' even infamous. If they have anything there, let me know. I'm sort of local.
Dawn