Abrahams faith was credited as righteousness.. his works were obedience.
Do you even understand what you are arguing? Abraham earned a favored place with God. Even dispensationalists generally acknowledge that the Abraham is a classic straight up example of the 'old style' covenant that they don't have to go through anymore.
Abraham demonstrated the depth of his faith by being willing to sacrifice Isaac. That would be examples of action and not words. Prior to that he had a reputation as a righteous man. I believe you are going to have difficulty making your grace case this way.
Abraham's descendants got free passes for doing all kinds of wrong minded stuff because God had made a covenant with Abraham and kept his word. There are other examples of descendant's being blessed because their parents were good folks despite the child being something of a dunderhead. Sampson comes to mind.
But again, we are talking about people using up earned credits. And we can just as easily talk about kinds suffering the consequences of their parents bad actions.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)
I believe that a scientist looking at nonscientific problems is just as dumb as the next guy.
Richard P. Feynman
If there is no struggle, there is no progress. Those who profess to favor freedom, and deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning. Frederick Douglass