A thanks to Dear Myrtle's Genealogy Blog for the tip about DAR databases online:
DearMYRTLE's Genealogy Blog: DAR: Online databases now available
A Search found ancestors William Roark (Rourke) #A098901*, John Backus, #A004355, Benjamin Baker, Sr., # A004870 and Edward Richmond, #A096057.
* Roark posts (many, but not all, posts about William Roark)
DAR Analytical cards - the first "Richmond" (surname)