But the point you overlook is that Abraham did not benefit from Jesus after He had "passed through the hands of Mary." Abraham benefited before that occurred.
Therefore he was not, and we are not "reconciled to God" by Mary or even with Mary's help, but by the work of Christ alone.
"No, not one" as it says in scripture. God is not bound by our time. There is no salvation w/o Jesus. Even those who physically came before Him are saved by Him and through Him.