Jefferson Davis Holtzclaw (the David you have is actually Davis) and Mamie Sheppard were my greatgrandparents. I am not sure who Malinda Green's husband was. I can tell you that J. Davis lived in the same house his entire life. So checking an earlier census might give you some info about her husband if you find a Green family living nearby with Malinda listed as wife.
By the 1920 census, my Holtzclaw line had spread into Butler, O'Neal and Austin townships. So you might look in those as well, particularly Butler township. The Greens and Holtzclaws lived fairly close to the border between the two townships.