Alerta de spoiler.
There's a reason why these legendary items were called Deathly Hallows. They let their wielders gain "triumph" over death. The cloak was technically the most powerful among the 3 because it hides the wearer from anything, even Death himself. According to the legend, its original wielder was able to dodge Death his entire life. After living a long, wonderful life, he decided to pass on the cloak.
The elder wand, though powerful in itself, turns its wielder into a likely target for challengers, and wizards have been murdered in their sleep for it. The stone, well, brings the dead back to life but they come back as "zombies." Dumbledore found that out the hard way.