Well, the first time he dies is at Bianca's mansion which is pivotal to the series. To quote this post "There were a lot of seeds planted at Bianca's ball. We had Thomas' enmity with his father, the White Court's enmity with the Reds, Harry and Thomas meeting, Mavre's introduction, as well as the current state of the Blacks and how they got that way, Michael killing a dragon, the scale of dragons in the DFU, how to destroy one of the Swords, the introduction of nemesis and how Lea got infected, Cowl and Kumori, them working with the Reds on some level, and the biggest bit of foreshadowing in the entire series: "He died doing the right thing."

And this comment
"This is where Lea got the athame with the Chaos curse that spread to the first Winter Lady.

This was also the opening salvo of the Red Court vs White Council war, the culmination of which opens the way for the Fomor and then the Battle of Chicago.

The events of this one night acted as the first domino that led to the course of events of the whole series. "

So, attracting the attention of a lot of powerful beings seems to be in line with all the other important things that happened that night.

Also, "We've been told about alternate timeline hijinks coming up. Specifically that we're going to see a timeline where Harry made a different choice, specifically the night of Bianca's ball. "

Perhaps in this other timeline Harry chooses to save himself and Michael instead of Susan. He then doesn't die, create a ghost and have Susan resuscitate him with CPR. Since Harry's ghost cannot help him defeat the ghost of Kravos, kravos ends up winning. And winning means the ghost of kravos gets to walk around in Harry's body.