Married Sarah Walker in Northampton may 1744, described of Gloucester. Will mentions his mother in law Mrs Walker of Northampton, who left money to the children.(so I looked up marriage)
8 children in total, some children buried with him in Deptford, Samuel died 1789 @34, Benjamin 34 in 1793 John 1805 a banker and possible wife of his 1795, or his sister, same address given, his widow died in 1801
Tree on line not very detailed, and am doubtful about his parentage given there, as the person has not read the will and put all the children on and put a different marriage for him.
Given the ages of children above, you should be able to find their births. Could be anywhere in the country, as ministers moved about a lot.
Found a John Olding marrying in London 1721, so could be the father.
Of you google him there are pictures of him on line.