Even if I believed the gospels (which I don't) they would still not convince me that Jesus died. All they say is that 'they saw he was dead'. Who did? What doctor? What tests? And the last thing a man can do when about to die of crucifixion, suffering from acute asphyxia, is cry out in a loud voice!
He is certainly not likely to be dead. Crucifixion was designed to be a long, slow drawn-out death lasting some days . Taken down after just a few hours he would have had a sore back from the scourging and wounds in his wrists and feet, painful but not life-threatening. A day or two in that cool tomb with TLC from Joe and Nick with their 100 lbs of ointments and lots of bandages would have had him on his feet with help and in a fit state to scarper.
No, a very unconvincing death. But since the whole story is fantasy anyway why should that bit be believable?