I find Armila Scott who died in AL. This son was born 1 Aug 1912 in Bullock Co. AL He died 17 Aug.1935 at the age of 23. He was the son of John H. Scott and his wife Mary J. Pitts. The thing to remember is that those were his parents. they were not living in 1935. They should have been living in 1912. I don't know if that far apart disqualifies them for the John you seek. Also this was a Black family. I don't know if that makes any difference to you.
Other information in the record of Armila Scott from Alabama Deaths
I also found the record of John Henry Scott and his wife Mary Jane Petts in the death record of Ben Scott who died 31 March 1950 in Troy, Pike, AL. This Ben Scott was born in 1900 and was 50 years old when he died. Here again your John Scott would have to be over 50 years old when Ben was born. Not a compelling candidate. . "Alabama Deaths, 1908-1974," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JD5K-Y9K : accessed 26 November 2015), John H. Scott in entry for Armila Scott, 17 Aug 1935; citing reference cn 18403, Department of Health, Montgomery; FHL microfilm 1,908,533.
John Henry Scott mentioned in the record of Ben Scott
Other information in the record of Ben Scott from Alabama Deaths
||31 Mar 1950|
||Troy, Pike, Alabama|
|Birth Year (Estimated)
||John Henry Scott|
||Mary Jane Petts|
Family Search has a list of John Scott's applications for Pardons after the civil war. You might be able to find his application if he served on the confederate side.
"Alabama Deaths, 1908-1974," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:JKQJ-4BM : accessed 26 November 2015), John Henry Scott in entry for Ben Scott, 31 Mar 1950; citing reference 6102, Department of Health, Montgomery; FHL microfilm 1,908,848.
Ancestry has Alabama Marriages, 1809-1920 (Selected Counties)
||29 Dec 1858|
||Minister of the Gospel|
They also have John Scott in the Alabama, Select marriages 1816-1957
||14 Sep 1830|
||, Greene, AL|
|FHL Film Number:
||1290852 V. A-C1|
I did look at the 1850 census you cited. Mary owns land in the census. There might be land records. Or if John died there might be intestate court documents or lord forbid a will. Those would be in AL. Which I don't have access to. All of the children were born in AL so they could have lived in Pike Co.as early as 1838. 1837 is probably the marriage year. Remember, the wedding would have been in SC. I went through both the SC marriage index and the AL index and did not see a John Scott that looked like a candidate. I think your only option is to check land record if they survived the civil war.