Re: Does this superhero team exist?
^I'm not sure I'd count that, since Green Lantern isn't so much an individual secret identity as a job title, like firefighter or Starfleet officer. It may seem like a singular identity to human observers -- "the Green Lantern" as a specific person who passes the mantle down to another, like the Flash or Robin -- but that's not what it really is.
And I've never heard of the first five you mentioned, or the last one. Plus you left out Alan Scott; he's not technically a Corps member, but he's been retconned/grandfathered in.
The first five are humans who wore the ring prior to Hal, some very briefly. The last one is the current GL on Earth, Simon Baz. I left out Alan on purpose for the reason you mention. And currently he doesn't exist on the New Earth (But does on Earth 2).
The boring one, the one with Khan, the one where Spock returns, the one with whales, the dumb one, the last one, the one with Kirk, the one with the Borg, the stupid one, the bad one, the new one, the other one with Khan.