Who is the most powerful Green Lantern of all?
Hal Jordan was the most powerful GL. UPDATE: The then universal weakness of the GL ring against the color yellow is irrelevant. Jordan somehow managed to clean Sinestro’s clock despite Sinestro’s yellow power ring, manged to literally gut the GL Corps, bring down Oa, take over the Central Power Battery, and massacree the Guardians on his way to becoming Parallax. The combined will and power of the GL Corps and the Guardians was not enough to stop Jordan. I think that classifies him as being the most powerful of them all.
