A couple of thoughts:
1) Use the Person to Person Outline Descendant Report instead of the Relationship Report. It is shorter and the correct parents will show without fiddling with the "preferred" spouse business. You can also add spouses, locations, birth and death years, and other data to the report - most of which can't be added to a Relationship Chart. It will also show multiple lines of descent, which the Relationship Chart won't do.
2) Tie the "famous person" to an ancestor common to a bunch of people. I tie mine to my Kansas Pioneer couple - which most of the hundreds of descendants can relate to. Just one chart then covers 100s of descendants.
3) Use the new Family and Pedigree Report to tie to an ancestor, which in turn, is tied to a 15th generation ancestor in one person-to-person report. Furnish each descendant with the two reports - one showing several generations of ancestors and another showing the line from the famous ancestor to one in that chart.
For example, this fella came to Plymouth the year after the Mayflower:
http://freepages.genealogy.rootsweb.ancestry.com/~riss/baldw...Or, for more examples, here are links of our family to presidents and famous people - tieing to either of two Kansas Pioneering couples, who, in turn, are ancestors to hundreds of descendants today:
http://freepages.genealogy.rootsweb.ancestry.com/~riss/baldw...http://freepages.genealogy.rootsweb.ancestry.com/~riss/baldw...