There wasn't one single contemporary scholar who wrote of Jesus or his disciples.
Everyone who mentions Jesus was born many years later, not even including the many years required to gain literacy!
Josephus, born 37 AD
Tacitus, born 56 AD
Suetonius, born 69 AD
Julius Africanus, born 160 AD
Origen, born 184 AD
Pliny the Younger born 61 AD

What evidence can you present supporting the sanity & integrity of the alleged apostles?
What evidence can you present supporting the sanity & integrity of these original believers?

Resurrection & demi-god saviours of humanity were a common theme throughout antiquity, yet you do not believe them for the same reason We do not believe yours... a complete lack of supporting evidence, a plethora of demonstrable failures, .and no credibility supporting the witnesses.

Even Biblical scholars agree the gospels borrow heavily from each other, particularly Matthew and Mark.
- Augustinian view:     Matthew written first; with Mark using Matthew, and Luke using Matthew and Mark
- Q source:    Matthew and Mark used a now lost source called "Q". Luke used both Matthew and Mark
- Markan priority:      Mark was written first, with Matthew using both Mark and an unknown source
- Four-source        Mark and three unknown sources were written first, which the other gospels drew on.
Their attempts to embellish and accredit each other is dubious to say the least, another telling sign is how the texts often contradict each other...

Each gospel contradicts the others...
John claims that one woman was present at the tomb.
Matthew claims that two women were at the tomb.
Mark claims there were three women at the tome.
Luke agrees there was three women, but gives different names.

Mark makes serious mistakes in his geographical references to Palestine.
Luke claims Jesus was born during the census of Quirinius (6 CE)
Luke also says Jesus was born during the reign or Herod (died 4 BCE) Matthew also claims this.
Matthew and Mark are often directly contradicting each other especially in regards to the birth and early life of Jesus.

Matthew, Mark, Luke and John all contradict each other with the last words of Jesus.
Matthew  "My God, my God, why have you forsaken me?" spoken in Hebrew.
Mark agrees with the words but claims it was spoken in Aramaic.
Luke "Father, unto thy hands I commend my spirit:"
John "It is finished"

Matthew claims Judas hung himself.
Acts claims Judas  fell and his guts exploded.

In the crucifixion story Jesus's body is removed from the cross, but Roman law dictates that crucified people were denied burial, instead being left to rot where all can see (gross right)

But again, there are no contemporaries who wrote of Jesus and his alleged disciples.
Do you have any evidence supporting their existence? prove all things
For historical figures we have contemporary eye witness accounts all from reputable scholars descending from varied cultures, we can trace the DNA of our ancestors as empires spread, there is demonstrable scientific evidence supporting the claims.