There are many automated tools  to help with the process of finding unknown parentage

There are also many techniques to help with the process of finding unknown parentage

You might try using the "What Are The Odds" tool at DNApainter to check your theory - https://dnapainter.com/tools/probability 

You also might try using "Genome Mate Pro" to organize your DNA segment data see youtube.com/watch?v=-LCs1ebJ-AQ 

In order to upload a GEDCOM to Ancestry you need to create one

Here is how I copy a family group from another Ancestry tree into my research tree

Save to Tree brings up this box

Click on Add a new person, once this person is added, click your browser's back button twice to go back to the oriiginal tree and add this person again with the whole family group

Now click the checkbox next to each family member you want to copy over and then Save to your tree

Another approach when the person is already in your tree is to use the trees on the Hints page

I check the checkbox for the best looking trees that have him and his parents

Then Review selected tree hints gets us the page where we can copy over each family member

You can keep repeating that as you build the tree up, go to his father's page and click on Ancestry Family Trees under Sources

A box comes up, click the View individual member trees

If the tree you copied him from has his parents then just click his name to go to his profile in that tree and use the Tools then Save to Tree to copy him with his family group from that tree

GWorks from DNAgedcom.com is my go to tool for building a database of the ancestors of your matches

blog.kittycooper.com/2017/09/solving-unknown-parentage-cases-with-dna/

If you watched my first talk, I glossed over how I had the surnames for Tessa's paternal match ancestors, in fact I used GWorks

Jane had a third cousin match at Ancestry with a good tree

Can  GWorks can identify which line from the second cousin match is the one they are related on?

Top ten ancestors in GWorks

Three of them have DNA tested descendants, check the abbreviated McGuire diagram for clues

3 children

D

Surname frequency from GWorks can help you decide which children's trees to build down in an unknown parentage case

So the next step was to look for the surname of Pratt B's wife and then for child D's spouse

Targeted Testing

Child D's spouse's surname is in the database many times, now to get a child of D, a possible parent to test

Clustering is a powerful way to group your related matches together in a visual diagram, this one is from DNAgedcom

https://blog.kittycooper.com/2018/12/more-automated-dna-match-clustering/

This cluster diagram is from GEDmatch

https://blog.kittycooper.com/2019/05/more-clustering-tools/

Ancestry has disallowed 3rd party tools to cluster your DNA matches there

but they have the ability to color code your matches into 24 groups plus star your "favorites" 

https://blog.kittycooper.com/2019/07/using-the-new-ancestry-dna-match-features/​

DNA2tree is only on iPhones and iPads via a paid subscription but it is a real game changer for unknown parentage searches

Here is a sample set of Common Ancestors 

Now there are only three lines, with no duplication of user names

BUGDEN pedigree for father's mother, full story here: https://blog.kittycooper.com/2019/12/can-ethnicity-help-with-unknown-parentage/

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If you are have a male line descendant from the unknown father, grandfather, or other ancestor you can test Y DNA which passes unchanged father to son

If you are from a population group who only took surnames in the last 100-200 years, a Y test is unlikely to give you a surname

Barry's autosomal DNA indicated that his unknown father was clearly a SMITH from a particular Southern town but look what the Y DNA showed!

My CURRENT APPROACH