There is no Heaven.....unless...

One thing to observe is that there are multiple raisings from death in the Christian tradition. They're recorded in the Old Testament (https://www.gotquestions.org/raised-from-the-dead.html), and everyone knows Jesus raised Lazarus before the Crucifixion. Many Catholic saints are said to have raised people from the dead, such as St. Vincent Ferrer. So I think it's incorrect to think that, in the Christian religion, Jesus' uniqueness comes down to having been the only person to have come back from the dead--rather, Jesus is unique in having returned to life permanently.

Among recent cases of anomalous/miraculous returns to life, I think that Sean George's is the most impressively documented that I know of. Fortunately for those of us interested in these topics, George is a medical doctor and has gone to great lengths to carefully compile and make publicly available the evidence that his experience defies current biological knowledge:  

https://seangeorge.com.au/timeline/
https://seangeorge.com.au/my-story/medical-details/
https://seangeorge.com.au/my-story/what-...re-saying/
https://www.youtube.com/@drseangeorge/videos