How were Lewis Powell's parents related?

[TNPowell]

Hello, I would like to introduce myself I am T. Powell and my line is from the George Cader Powell. I have been able to confirm Benjamin Powell is his father and apparently the Elizabeth that shows up in the church records is George Cader Powell's sister. Benjamin Powell's Will says " to beloved son, George C. Powell" also "After the death of his sister, Elizabeth Powell". In GCP family bible list Benjamin death October 17 1836.

Now connecting Benjamin to the correct Powell's is the tricky part.
George was a "COUSIN" to his wife Caroline we know her father to be William Powell 1794 - 1813 and we know his father to be Cader Powell 1750.

What I know about Benjamin Powell, he would have been born between 1760 - 51 .

In 1788 Burke Co. GA. Benjamin has three land plats are in the Headright and Bounty records show 200 acres, 45 acres, 32 acres.

He is still in Waynesboro Burke Co. Ga 1820 census:
Name Benjn Powell Home in 1820 Waynesboro, Burke, Georgia Enumeration Date August 7, 1820 Free White Persons - Males - 10 thru 15 =1 Free White Persons - Males - 45 and over =1 Free White Persons - Females - 45 and over =1 Slaves - Males - Under 14 =1 Slaves - Females - Under 14 =1 Slaves - Females - 14 thru 25 =1 Slaves - Females - 45 and over =1 Number of Persons - Engaged in Agriculture =1 Free White Persons - Under 16 =1 Free White Persons - Over 25 =2 Total Free White Persons =3 Total Slaves =4 Total All Persons - White, Slaves, Colored, Other =7
The dates coincide with George Cader Powell birth on December 13 1809 in Burke Co. GA he would be the Free White Males - 10 thru 15 =1...

The next census is 1830 Crawford Co. GA. I am sure Benjamin is the older free white male age 70 - 79 living with his son George C. Powell. Also the free white female listed to be age 50 - 59 most likely is Elizabeth sister to George. Elizabeth could be from a earlier marriage for Benjamin to ...??? And George being a late in life child his mother is ...???
George and Caroline were married on May 23, 1830 • Talbot, Georgia, USA

Sorry I will STOP there...
Any wisdom you can share would be welcome...