Kendall is the best I’ve found so far, since he not only proposes a genealogical GAE but does it on the basis of science and maths (his book is titled “The Kinship of Men: An Argument From Pedigrees, Or Genealogy Viewed As A Science”), and since he appears to have been aware of Mendelian inheritance, and proposes the ancestors are undetectable. His view is really aligned to yours on all the key points.
However I’ve also done a lot of reading on the history of pre-Adamism (David Livingstone has done the best work here), and I think it’s useful to observe how the general idea of pre-Adamic humans who intermarried with Adam and Eve’s children, has real antiquity.