As you stated, John Painter/Panther/Panter appears on the 1787-1802 Loudoun Co Personal Property Tax Lists.
Loudoun Co Order Book Q, 14 September 1796[p. 493] Samuel RAVENSCRAFT against John PAINTER – upon petition – Defendant failed to appear; judgment granted Plaintiff for £3 and costs.
Loudoun Co Order Book R, 15 June 1797[p. 142] Samuel RAVENSCRAFT against John PAINTER – upon petition – judgment entered on this petition is set aside and the proceedings thereon quashed and that it be again placed on the dockett.
Loudoun Co Order Book R, 9 January 1798
[p. 277] Samuel RAVENSCRAFT against John PAINTER; Ann S. ETHELL against Walter POWER – upon petitions – S'l. RAVENSCRAFT not having complied with the rule of the last ct., dismissed with costs.
No mention of the surname in the Loudoun Co Deed Books, 1757-1810.
From “Index to Loudoun Co Wills, 1757-1750” by Hutchison:
Date of will: 25 Mar 1797
Received in Court: 
Beazer, —, Wife
Carter, Edith, Eldest Daughter
Campbell, John, Son-in-law
Campbell, Elizabeth, Daughter
Painter, Guluhnah, Daughter
Shively, Sarah, Daughter
Clandenning, Samuel, executor
White, James, witness
Beal, Thomas, witness
White, Robert, witness
Plasterer. No return information given.
From Loudoun Co Will Book Abstracts by Pat Duncan:
Settlement with Exor Ebenezer GRUBB: Court order dated 13 Feb 1837; beginning 15 Mar 1835, sale notes, payments to widow Mary GRUBB & William GRUBB, 1 year annuity to Gulialma PAINTER wife of Edward PAINTER for land. Returned to court 11 Sep 1837. [X:379]
Settlement with Exors Ebenezer & Curtis GRUBB: Court order dated 11 Feb 1839; beginning Mar 1835, medical services for servant Peggy, annuity to Gulielma PAINTER, from hire of Negroes Venus & Amos, legacy to Jacob GRUBB, widow Mary GRUBB and five sons; five daughters didn’t like will provisions and filed suit. Returned to court 13 Nov 1839. [Z:108]
Settlement with Exor Ebenezer GRUBB: Court order dated 11 Nov 1841; beginning 1 Jan 1836; to Gisbilma PAINTER her annuity; only the sons (including William GRUBB Jr. & Curtis GRUBB) have interest in this estate, daughters receive nothing, settlement with widow Mary GRUBB. Returned to court 14 May 1844. [2B:80]
Settlement with Exor Ebenezer GRUBB: beginning 1 Apr 1844; annuity to Gulielma PAINTER til her death (late spring 1850), distributions to widow Mary E. GRUBB, William GRUBB, John GRUBB, Benj. H. GRUBB, Curtis GRUBB, Ebenezer GRUBB. Returned to court 7 Feb 1851. [2F:219]
It doesn't appear they created many records.