For what it's worth, I always thought that Dennis Quaid in full-on
The Right Stuff Gordo Cooper mode would have been a great Hal Jordan (assuming that you could get 1983-or-so-era Dennis Quaid, of course).
Ideally, someone who can pull off that attitude.... tha man-without-fear, "who's-the-greatest-pilot-you-ever-saw? You're-lookin'-at-him" thing, and a look that evokes Paul Newman circa 1959 would be the way to go. Are there actors around that could do that?
(Perhaps ideally we could get a Time Bubble and yank Newman himself out of 1959; he could have done the role in his sleep...)
And I had to address this...

OOOOHHHHHH GOOOD NOOOOOOOOOO!!!!!!!!!!!

( runs SCREAMING from the computer)
I'm serious, Hayden is perfect. That boring personality. That lack of charisma. That obnoxious, elitist, arrogance. That willful, tragic unawareness of modern hipness. That annoying sense of entitlement. The fact that everyone around them is a thousand times cooler then they are. And they both went evil and killed all of their friends. He was practically playing Hal Jordan in Star Wars. O'Neil's classic Green Lantern/Green Arrow run was basically one, long running gag about what an uncool, out of touch, tool Hal was. Which is why it was a classic, because it was the first to point out the obvious.
The only cool thing Hal Jordan ever did was punch out Batman, a character even more annoying then he is. If Anikan had done that to Jar Jar, that would have been awesome.
I can see your point, and Hal as the late-50s Cold War single-combat-warrior test pilot was a perfect foil for the late-60's liberal-man-of-conscience Oliver Queen.
I reject the notion that Hal lacked charisma, though. Out of touch, certainly--but uncool? Never. I am reminded of a clip I've seen of Dean Martin introducing the Rolling Stones on a TV variety show; he makes a couple lame jokes and comes off as a little snide, even, about these limeys with the hair and the jeans and the yeah-yeah music.
But even Elvis wanted to be Dean Martin when he grew up.
I am also reminded of a piece Hunter Thompson wrote about Air Force test pilots in the late 60s. These were highly educated, very disciplined individuals, about as far removed as you can get from a Gordo Cooper or indeed a Chuck Yeager as you can get. I wonder how cool and charismatic and with-it they might have looked next to Oliver Queen...
Hal Jordan, to me, is a nice cocktail of Mercury astronaut (probably excluding John Glenn), Dean Martin, and Paul Newman. And how that combination adds up to anything less than pure cool I don't know. Perhaps you and I will just have to disagree on that point.
--g