Abraham breathed his last and died in a good old age, an old man and full of years. His sons, Isaac and Ishmael, buried him (Gen 25.8-9).
And Isaac breathed his last. He was old and full of days. His sons, Esau and Jacob, buried him (Gen 35.29).
Conflicts between Isaac and Ishmael and between Esau and Jacob were well-documented in the chapters of Genesis. The one between Isaac and Ishmael was more subtle. In fact, perhaps it was the mothers who held grudge against each other, namely, Sarah and Hagar. But Esau really had a bad blood toward Jacob (perfectly understood, though, given what Jacob had done toward Esau).
Nevertheless, death of a relative perhaps covered a multitude of sins. The brothers reconciled (or, were they reunified only?) at the tomb of their fathers, respectively, after years of animosity and hatred (indeed, Esau and Jacob have had some kind of pre-reconciliation in Gen 33 although it was not final yet since Jacob was still not completely comfortable with Esau, Gen 33.13-14).
To complete the set of the Patriarchs (that is, Abraham, Isaac, and Jacob), what happened, then, at the death of Jacob? Similar thing, reconciliation. Joseph’s brothers feared that after they buried Jacob, Joseph would pay them back for all the evil that they had done to him. Thankfully, it never materialized. Joseph forgave his brothers, comforted them and spoke kindly to them (Gen 50.14-21).
Happy endings did exist, after all.