Of course, his pre-New 52 versions had a lot of appearances...
Guy Gardner. Probably Deathstroke. Doomsday, sure. Rick Flagg.
Not sure where the idea that Rorschach made a sacrifice came from. The tale left little doubt that he was simply immature and incapable of dealing with sacrifice.
Flash and Supergirl in COIE are proper candidates. As is Superman during "The Man Who Has Everything", that Alan Moore story involving Mongul and Dave Gibbons art.