I know someone in the SAR who says his Revolutionary War ancestor was the last surviving veteran of the war--I need to tell him about John Gray and see if his ancestor died after March 29, 1868.
John Gray outlived 13 of the first 16 Presidents, including 5 who were born after Cornwallis surrendered at Yorktown.
One of my Revolutionary War ancestors was also in a Virginia militia company (from what is now West Virginia) and was at Yorktown when the British surrendered. He died in 1830 and though his widow tried for years to get his soldiers pension the government turned her down.
And my RW ancestor (also Virginia Militia) died a couple of years after 1785 after he settled the division of his Kentucky lands awarded him for his service between his sons from his first marriage. His son and daughter from his 2nd marriage inherited the Virginia estate, while the older boys headed to the Kentucky frontier. 2 of the older sons married Dr. Henry Clay’s daughters (they all traveled to Kentucky together.) We might even be cousins!
The last survivor of the Americans who were at Lexington Green on April 19, 1775, died in 1864 at the age of 96.