Ramble incoming...
I'm a big Wolverine fan, but I'd have to say the answer is Scott. Well, actually, it is and it isn't...
I tend to think Logan was hard-pressed just to control his inner berserker when Xavier first tagged him (I mean, check out the early issues after Giant-Size #1... the man's barely sane, let alone civil). His infatuation with Jean was an anchor which he used to slowly pull himself back to humanity. As his sense of honor asserted itself, so did his realization that she belonged to someone else and it just wasn't going to happen with him.
As crushes go, it was a powerful one, and like many of the "if only..." moments in our lives, it stuck with him and influenced his behavior for a long time, especially when he was perceptive enough to notice that Scott didn't always treat her right-- or at least, not the way Logan might have treated her. But I'm not sure it was ever really "love," even from his perspective.
From hers, I can buy that Jean was mildly attracted to Logan and the freedom he represented... Jean's life as an X-Man was often one of holding in her power, fearing what it might do, and Logan's the ultimate "devil may care, let 'er rip" personality. They fought with the same demons, besides which Jean was not immune to Logan's (somewhat rough) charisma. But I don't think she ever saw herself with him in anything but her most idle fantasies.
Jean and Scott?
Well, from one perspective, they were THE love story of the X-Men. I mean, the Phoenix saga? There's a tragedy there that only really works if it's True Love, the depth of which has been demonstrated time and again. And yet...
I don't know if you've noticed, but Cyke really does tend to tread upon the women in his life. Forget Emma Frost-- what about Madelyne, his wife of over a year while Jean was dead, cast aside with hardly a thought when she returned? Sure, she was a clone, and that changes the situation... sorta. But the fact remains, Scott has a history of doing pretty much the same thing he did to Jean at the end. Like many people who hold their emotions tightly in check, he tends to save 'em up until they boil over and he does something selfish, thoughtless and/or stupid. I can empathize with that tendency, but not excuse it.
I'm not saying Scott didn't love Jean, mind you. I'm just saying he was bad at it.
Jean, for her part, was a schoolgirl when she came to the X-Men... a schoolgirl with a crush that deepened into love, probably further and faster for her than for him. Actually, if *not* for their star-crossed relationship, I think Scott & Jean might have tried it for a little while, decided it didn't work, and moved on... but fate put so many mountains in their path and they made so many heroic efforts to overcome them, they almost couldn't help but love each other.
So what's the verdict?
Logan, for all his rough edges, could probably make a better life for Jean than Scott could, if only because he's more willing to openly express his feelings for her. But that really doesn't matter-- because they BOTH know it'll always be Scott, just as Emma (another character I can't help but like, if only 'cause she gets all the best lines) knows on some level that it'll always be Jean.
So we're left with a situation where Logan lost what he thought he wanted and Scott's stuck with his second choice because he wasn't bright enough to hold onto a good deal and Jean never really got treated the way she deserved by either of 'em and Emma resents the whole thing. That's life. It's imperfect. We get what we choose, not what's best for us.
But if the world WAS fair for a couple of days, just for a change, it'd be Jean and Scott.
That's brilliant.
