How certain are you regarding the year of birth for Thomas Creamer? The only death registration I can find for 'about 1837' in Buckinghamshire is Q3 1837 Newport Pagnell district and that is for a Thomas Creamer age 54 which would give a yob c1783 - although it should be noted that civil registration only began on 1st July 1837, so any deaths before that date would be recorded in parish registers only.
With the above information, there is a baptism in Olney Bucks for a Thomas Creamer on 16th August 1783 with parents Thomas and Sarah (plus a daughter Elizabeth to the same couple baptised on 21st August 1781).