The earliest church fathers were UNANIMOUS that the traditional Gospel authors are the ones who wrote their Gospels.
Here are the historical quotations from those early church fathers. Click on the pertinent links.
Matthew Authorship
1. Church Fathers and Matthew’s Gospel | James Malcolm
Mark Authorship
2. Church Fathers and Mark’s Gospel | James Malcolm
Luke Authorship
3. Church Fathers and Luke’s Gospel | James Malcolm
John Authorship
4. Church Fathers and John’s Gospel | James Malcolm
In addition, the authorship of the Gospels was not questioned until Faustus, well over 300 years after the fact. Proximity matters in historiography. Those closest to the writings all stated that the traditional author attributions were intact.
Science has never proven that God and the supernatural do not and cannot exist, so your skepticism is not based in science and is, in fact, what is irrational.
Carl Sagan's claim. Tell me, what would qualify as extraordinary evidence for the resurrection of Jesus?
The Gospels and various epistles, plus extra-Biblical attestations, are multiple, independent, historical confirmations of the life and events of Jesus Christ.