Some i can think right away:
"Close your eyes, feel the sweet symphony of sighs" from "A Psychotic Waltz" by Psychotic Waltz. Also the main melody from the middle, to nearly the ending of "Into The Everflow" (same band)
The chorus of "Suite Sister Mary", the ending of "Eyes Of A Stranger", the chorus of "Killing Words", "I'll teach you to laugh and to cry, they're the same you'll see" and the chorus from "Screaming In Digital", and so many more from Queensryche
The cellos in "Change Of Seasons" and the ending part of "Dimensions" from "A Sense Of Change" by Sieges Even.
The chorus of Shadow Gallery's "I Believe" and most of their ballads' choruses.
The ending of Mayfair's "Ecstasy".
And to mention something forum related, "The Accolade" where R.A. sings "Into the morning sun. Down his chosen road he rides to save the world" and then the chorus.