Menachem Shmei writes” You have a question from a posuk, and Ramban there answers. End of story. There is no contradiction between Torah Sebiksav and Shebaal Peh here.” Well, your interpretation of Rashi contradicts Torah Shebischav where it says clearly that a. Yaacov expired and b. Yaacov died (the brothers saw that their father died).
Again, Torah Shebal Peh does NOT CONTRADICT EVER Torah Shebischav, period. The issue with the Tzedoikim was that they interpreted Torah Shebchsav wrongly because they disregarded Torah Shebaal Peh entirely, not that they interpreted it wrong like YOU are doing to try to “prove the authenticity” of YOUR AVODAH ZORA worship of your rebbe. Whatever you want things should mean you interpret it that way.
Torah Shebachsav expands and explains the Torah Shebaal Peh, particularly it teaches us how to implement halacha of Torah Shebischav in our everyday lives. The Torah Shebaal Peh does not contradict the halacha in Torah Shebischav, it teaches and expounds and clarifies it, so does not Torah Shebaal Peh contradict Torah Shebischsav in anything, not only halacha.