I always liked the hypothesis that maybe they were the first human (in the neolytical time) with which God contacted, before Abraham, and he granted them basic Revelation (the first part of the Genesis, the one of the Seven “Days”) and a Morality System. When they disobeyed (IDK how but it probably has to be related to arrogannce and a literal snake/Satan in disguise that tempted them) they commited the Original Sin and fell.
Obviously, this hypothesis has many gaps and limitations, but I think it merges well Genesis and evolutive evidence