No Apollo or Samaritan? I think they're both interesting takes on Superman. Of course, I tend to feel Apollo was most interesting when Ellis was still writing the character. After that, he was sort of defined primarily by his homosexuality. I liked the fact they had the balls to have him and Midnighter be "out", but it sort of overtook his characterization. And then, when he became a dad, being a father to Jenny Quantum took over his characterization. But I dunno...maybe there just wasn't anything left in the character if you remove those two things.
Samaritan is cool for showing the "human" side of the superman archetype. Dreaming about the freedom to simply fly, without worrying about flying from one emergency to the next. Going on a date. The loneliness of power. Very human things that center and root a very superhuman character in things that are familiar.
Icon was...always rather dull. Maybe that was the point of the writing, though. But Rocket was always a more interesting character. One thing I liked about Icon was that he knew more of the black man's struggle in America than any of Rocket's embittered disenfranchisement could come close to touching. It's like, "Oh Raquel...the white man's keeping you down because you got fired from a job? Interesting. Well, when I came to earth in the 1800s, I WAS A GODDAMN SLAVE."
Sentry was...well. It's difficult to put it simply. Sentry was a cool idea when it was just a one-off miniseries. Because he was excised from the collective memory of the MU, it was almost like one big "What If", where the subject was "What If Superman Had Been a Marvel Character?"
Sentry would have been great if they'd just left him to slip out of active memory again; to never again be integrated into the MU. He's not a character that has any sort of staying power, because the Void so completely balances him out that he is literally his own worst enemy. To truly defeat the Void, Sentry must utterly disappear.
But they tried to integrate him. And to make matters worse, they clearly did so without any actual game plan whatsoever. So, everything they did with the character felt like random shoehorning. There were so many missed opportunities that could have eased the character in. Moments that he could have shared with other heroes.
There was a scene in the New Avengers annual, where Luke Cage is in the foreground crying out in joy because his girlfriend is pregnant. In the background of the panel, you see Sentry and Captain America engaged in what looks to be a conversation. A living legend who was forcibly removed from the world for decades, and a forgotten hero who chose to remove himself from the world. Seems to me, that conversation would have been more important than an entire panel devoted to Luke Cage whooping for joy.
Sentry's integration into the MU was so poorly orchestrated...
"You must be proud, bold, pleasant, resolute,
And now and then stab, as occasion serves."
Edward II: Act 2 Scene 1, by Christopher Marlowe