Someone's going to have to start praying to Billy Graham first. There was a thread last month(?) wherein the author speculated on whether questionable-Catholic so-and-so was in Heaven. The author concluded with him stating that he would start praying to this deceased individual, to see if any miracles might happen. Maybe you could do likewise in Graham's case.
The Church doesn’t make saints. It confirms through proof of two miracles established by an international panel of experts and neutral scientists that a person who was praying to a particular individual was cured completely, of what the doctors called an incurable disease, and the cure must be complete and permanent. This is earthly confirmation that the person is in Heaven. It takes one miracle to achieve the status of “Blessed.” So far even Bishop Fulton J. Sheen has not attained the “Blessed” status. So good luck on Billy Graham.