Found nothing on SSDI

Guy appears on these two Censuses with his maternal grandparents, along with his mother:
1910/ Tennessee/ Greene…(would not load)
h/ Thomas Mitchell, 64y b.TN
w/ Elizabeth, 67y b.TN
s/ John, 36y b.TN
d/ Pearl, 31y b.TN
s/ James, 29y b.TN
d/ Willie,, 27y b.TN
s/ Thomas, 26y b.TN
d/ Blaine, 22y b.TN
gs/ Hyda, 14y b.TN
gs/ Guy, 7y b.TN
gs/ Bruce 5y b.TN
gs/ Rhea, 4y b.TN
gd/ Ethel, 1y b.TN

1920/ Tennessee/ Greene…(would not load)
h/ Thomas Mitchell, 73y b.TN
w/ Sarah E, 71y b.TN
s/ John A, 42y b.TN
s/ James, 40y b.TN
d/ Pearl, 35y b.TN
gs/ Guy, 18y b.TN
gs/ Bruce, 16y b.TN
gs/ Roy, 15y b.TN
gd/ Ethel, 12y b.TN
gs/ James, 2y 7mos b.TN

Guy Mitchell (28y) and Dora Shelton (18y) married 20 January 1930 in Greene County, Tennessee. (Image)

He and his wife appear here with his s/b uncle:
1930/ Tennessee/ Greene
h/ John Mitchell, 56y b.TN, occ: Farmer, * Veteran-No *
brother/ James, 49y b.TN, DIV [?], occ: Laborer/Farm, * Veteran-No *
sister/ Pearl, 45y b.TN, DIV
s/b nephew/ James Jr, 14y b.TN
s/b nephew/ Guy, 28y b.TN, occ: Farmer, * Veteran-No *
s/b sil/ Dora, 16y b.TN

1940/ Tennessee/ Greene
h/ Guy Mitchell, 38y b.TN, G3, occ: Tenant Farmer
w/ Dora, 24y b.TN, G8
s/ Willard, 9y b.TN, G2
s/ Bradley, 7y b.TN
d/ Louise, 5y b.TN
d/ Imogene, 6mos b.TN
uncle/ John, 69y b.TN, G4, occ: Retired Farmer
mother/ Pearl, 64y b.TN, DIV, no school
brother/ James, 22y b.TN, no school, occ: Laborer/Farm
residence: Chuckey Route 4
residence in 1935: same house

1950/ Tennessee/ Greene (ED 30-1, pg 10)
h/ Guy Mitchell, 47y b.TN, G3, occ: Farmer
w/ Dora S, 37y b.TN
s/ Willard L, 19y b.TN, occ: Farm Helper
s/ Bradley, 17y b.TN, occ: Farm Helper
d/ Margaret L, 15y b.TN
d/ Imogene, 10y b.TN, G3
s/ Allen Ray, 5y b.TN
mother/ Pearl, 64y b.TN, Separated
brother/ James, 30y b.TN, occ: Farm Helper

Record of Birth (daughter)
Marguerite Louise Mitchell
b.16 August 1934
birthplace: Greene County, Tennessee
father: Guy Mitchell
mother: Dora E Shelton
"Tennessee Births, 1828-1939"
FamilySearch (no image available)