FuzzyMo -- starting 1928 a lot of people would be listening to Jimmie Rodgers and the Carter Family. Lots of vaudeville and novelty songs too. There are also any number of songhits of the 20's books on the market. There is a website which you can find (I don't have the reference, try a search under "Billboard" for a start) that has all the top sales for each year during the century.

Seed is right about "Just A Closer Walk With Thee", a current fave. Dave Van Ronk, who we have been talking about in a recent thread, did a lot of this stuff. His Smithsonian/Folkways Years album has some great blends, including a hot verson of JACLWWT.
yours, Peter T.