Roman Emperor Tiberias and Jesus

We have more evidence for Jesus from different writings in the ancient world, then we probably should have for someone of his stature because we have Matthew, Mark, and Luke and John these four biographies. There's really only one other person in around that time that can claim to have that much kind of independent testimony of their life.

And it's the Roman Emperor Tiberias. So he has. He also has four biographers he has. Cassius Dio, Suetonius, Tacitus, and Velleius Paterculus.  So the Roman Emperor, who's the most famous, most powerful person of the time, has a similar amount of historiographical evidence biographically for his, the events of his lifetime that Jesus does.

A.N. Sherwin White summarizes the historical evidence for Tiberius

“The story of [his] reign is known from four sources, the Annals of Tacitus and the biography of Suetonius, written some eighty or ninety years later, the brief contemporary record of Velleius Paterculus, and the third-century of Cassius Dio. These disagree amongst themselves in the wildest possible fashion, both in major matters of political action or motive and in specific details of minor events…But this does not prevent the belief that the material of Tacitus can be used to write a history of Tiberius” (p. 187-188).

So, it is astonishing that while Graeco-Roman historians have been growing in confidence, the twentieth-century study of the Gospel narratives, starting from no less promising material, has taken so gloomy a turn....that the historical Christ is unknowable and the history of his mission cannot be written. 

This seems very curious when one compares the case for the best-known contemporary of Christ, who like Christ is a well-documented figure—Tiberius Caesar. The story of his reign is known from four sources, the Annals of Tacitus and the biography of Suetonius, written some eighty or ninety years later, the brief contemporary record of Velleius Paterculus, and the third-century history of Cassius Dio. These disagree amongst themselves in the wildest possible fashion, both in major matters of political action or motive and in specific details of minor events. Everyone would admit that Tacitus is the best of all the sources, and yet no serious modern historian would accept at face value the majority of the statements of Tacitus about the motives of Tiberius. But this does not prevent the belief that the material of Tacitus can be used to write a history of Tiberius.(Roman Society and Roman Law in the New Testament A.N. Sherwin White, p186-187)