From to a biblical perspective, if the foundational sin is pride, which I would say aligns with both original sin - seeking a means of becoming equal with God through the Edenic fruit - as well as the final sin, transhumanism - an attempt reject reality as a means of achieving immortality via materialism, then the inversion of pride is humility, to be sure. Humility is also at the root of acknowledging God’s role as both creator and sustainer, as well as the need for God as incarnate savior in light of our fallen state. Moreover, it takes humility to surrender not only at that initial point of salvation, asserting the need for saving grace at the Cross, but also in an ongoing process of growth and maturity after that point as we submit to His authority over our lives, moment by moment. So, yes, absolute pride is the original sin, therefore absolute humility is the foundational virtue. However, this only insofar as your willingness to take zero credit for any good within you, attributing all to God through the saving power of His Son, Jesus Christ, the God who became man, lived a perfect life, died on the cross, rose again, and now sits at the right hand of the Father.