Aaron appears to have married Elizabeth Evans at Newland, not Littledean so the Aaron born in Welsh Bicknor would seem to be the logical one but not absolute proof.

There's a Aaron Hale that married Ann Balding in Littledean in 1787 which would look like a match for the other Aaron.

This might be worth following up

BNA Gloucester Journal - Saturday 13 August 1859

Gloucestershire Summer Assizes

HALE v VOICE

…….This was an action for ejectment to obtain possession of a house and garden at West Dean……….. the property in question……….was one of the encroachments which had been made previous to 1787 and as such might be purchased from the Crown for a small sum. Aaron Hale, the grandfather of the plaintiff, so purchased the property of the Crown in 1845 and it was duly conveyed to him. Thomas Hale, the plaintiff, was his grandson and was therefore the heir at law, and was entitled to this property. Mr Powell (for the defendant) contended that the property had been given to the defendant under a deed of gift from Aaron Hale, her father, and she, having had possession for 30 years, could not be dispossessed……………The jury found a verdict for the plaintiff.

The grandson could have been the 1829 Thomas and his grandfather the 1765 Aaron. The defendant, although not named here, might have been Thomas’s aunt. Maybe this one:-

Record_ID 11263
Entry_Number 530
Year 1827
Month Mar
Day 3
Grooms_Surname VOICE
Grooms_Forenames George
Grooms_Age not stated
Groom_Condition Bachelor
Grooms_Occupation not stated
Grooms_Residence Hundred of Saint Briavels
Grooms_Fathers_Surname not stated
Grooms_Fathers_Forenames not stated
Grooms_Fathers_Occupation not stated
Brides_Surname HALE
Brides_Forenames Hannah
Brides_Age not stated
Brides_Condition Spinster
Brides_Occupation not stated
Brides_Residence Hundred of Saint Briavels
Brides_Fathers_Surname not stated
Brides_Fathers_Forenames not stated
Brides_Fathers_Occupation [not stated]
Licence_or_Banns Banns
Date_of_Banns [not stated]
Signature_or_Mark Both mark
Witness_1 Thomas Hawkins
Witness_2 Ann Harris
Other_Witnesses
Officiating_Minister Edward Jones Rector
Event Marriage
Memoranda
Notes
Register_Reference P220 IN 1/7
Page_Number 26
Parish_Chapel Mitcheldean

Hello Karen,
Your posting made me revisit what I had previously thought about the ancestors of my 6g grandfather Moses Hale (1763 - 1855) brother of your Aaron.
Like you, I had their parents as Aaron and Susan. I've rechecked and am now convinced that they were the parents. I was confused because, within a few years, one child was baptised in Ruardean and two in Welsh Bicknor. I posted a question about regulations covering where a child was baptised and the replies confirmed that there could be good reasons why they swapped parishes. So here is my theory:
We know from his baptism in Welsh Bicknor on 23 January 1763 that Moses Hale was the son of Aaron and Susan Hale. There was another baptism in Welsh Bicknor on 10 February 1765 of Aaron, son of Aaron and Susan.
Prior to the baptisms in Welsh Bicknor, there was one in Ruardean of Henry Hale, son of Aaron and Susan, on 29 March 1761. Ruardean and Welsh Bicknor are about 5 miles apart on either side of the River Wye, less if there was a ferry in those days.
Prior to Henry’s baptism there was a marriage on 12 July 1760 in Ruardean of Aaron Hale to Susannah More so circumstantial evidence points to Aaron Hale and Susannah More being the parents of Moses, Henry and Aaron.
I have not found any more children of Aaron and Susan which would indicate that the burial in Ruardean of Aaron Hale on 2 March 1766 was most likely this Aaron; and that of Susan Hale on 25 June the following year being his widow.
So far I have not found a definite baptism for Aaron but if he was about 20 when he married, it would have been around 1740. That's my next job - to look at the advice that you have already been given by Forum members.
Lesley