Hi! My line is from 'next door' in Washington, Jefferson, and Keokuk Counties. None of the names you list ring a bell, but there may be some connection. My G-Grandfather was Wilson Shannon Cook who married Delilah Ella Singleton. They lived north of Richland, just east of Hopewell Church.
I would be glad to exchange info if this seems to connect anywhere.
Take a look at my webpage:
http://sjcook.com/genealogy/TNG/index.phpIt still needs a lot of work, but is usable.
Sam Cook, Milan, MO