You inspired me to go digging in my files to see if there was something I had missed. Thank you!
Hope this helps. Looks like John died pre 1930 (Katie noted as Wd in 1930 census) but he's not noted in the Stillmore City Cemetery records.
Emanuel Memories by James Dorsey page 229
Letter from Jane Jackson, 1982, notes spouse of Katie is John Hargrove
1910; Census Place: Militia District 528, Houston, Georgia; Roll: T624_195; Page: 12B; Enumeration District: 42; Image: 251. Name Age John L Hargrove 36 Katie R Hargrove 28 Willie Hargrove 10 Jewell Hargrove 9 Robert Hargrove 6 John E Hargrove 5 Julia Hargrove 1
1920;Census Place: Stillmore, Emanuel, Georgia; Roll: T625_256; Page: 5B; Enumeration District: 29; Image: 231. Name Age J H Hargrors 45 Katie Hargrors 39 Jewel Hargrors 19 Robert Hargrors 16 Emmit Hargrors 14 Julia Hargrors 11 Richard T Hargrors 6 Kathereen Pate Hargrors 2/12
1930; Census Place: Stillmore, Emanuel, Georgia; Roll: 355; Page: 3A; Enumeration District: 10; Image: 239.0. Name Age Kate Hargrove 48noted as wd Emmett Hargrove 23 Jewell H Hargrove 30 Katherine Hargrove 10 Sue Hargrove 4
Gone but not forgotten : A Tombstone Registry of Emanuel County, Georgia, pg 6 - Katie Amsel Hargrove Aug 28, 1880 - Sep 7 1943