Top 20 most powerful superheroes

So since I've seen how the Wizard's top 20 most powerful superheros, I've seen a few flaws so how about we let the comic vine community decide who are the most powerful superheroes of all time are, remember powerful not strongest, this isn't just about strength. And keep in mind superheros, cuz if you put the Void possessing Sentry's body, he wasn't actually a superhero, even if he acted like one.
So who are the top 20 most powerful superheros superheros?