Christianity is an appropriation

To be fair, almost all Greeks believed in eternal life after death, albeit not in the Nicene Heaven/Hell sense. That's definitely not a Platonic-only view.

I suppose the most biblical view of life after death is that all will sleep until the Day of Resurrection. On that day, the living and the resurrected dead will be judged according to their deeds. The righteous - either by faith in Christ or perhaps by good works - will be granted immortal, flawless, sinless bodies, and they will live forever with God and Jesus. The unrighteous will be destroyed in the Lake of Fire along with sin, death, and the grave.

Of course, you can find plenty of verses that contradict that tidy interpretation. The Bible is vague and confusing about what happens after death, and that's just the core 66 books! Add in the deuterocanon and it gets even more confusing. Then you get the Holy Tradition supposedly handed down from the Apostles and...hoo boy.