Mmmmm i'm not really into ballads, but i'll post some (I don't guarantee that you'll cry though )
Symphony X- Candlelight Fantasia
Symphony X- Lady Of The Snow
Symphony X- A Winter's Dream
Symphony X- The Edge Of Forever (this one has some up tempo parts)
Symphony X- Awakenings (see above)
As you may see, I don't really know too much about ballads
Metallica - Fade To Black
Judas Priest - Before The Dawn
Judas Priest - Beyond The Realms Of Death
Anathema - Anyone, Anywhere
Opeth - A Fair Judgement
Opeth - Credence
cinderella - dont know what yove got
poison - every rose
alice cooper - only women bleed
alice cooper - Loves a loaded gun
U2 - Beautiful day (not reely metal but its a kool trak)
Alice cooper - its me
Opeth - Credence
Opeth - A Fair Judgement
Metallica - Fade To Black
Metallica - One
Lots of Katatonia/Anathema/My Dying Bride
Testament - Return to Serenity
Um...I should be able to think of more, but bah.
Rock ballads...
Staind - Outside (live)
Stone Sour - Bother
Muse - Unintended
Radiohead - Exit Music
The Offspring - Gone Away
Nightwish-Sleeping Sun
Rhapsody-Lemento Eroico
Dream Theater-Anna Lee
Nightwish-Swanheart
Opeth-Face of Melinda (Not sure if this is strictly a ballad)
Am I the only one that would love to hear slayer do a ballad? I thought so.
My favorite ballads would have to be Opeth's Patterns in the Ivy II and Still Day Beneath the Sun. Fuckin beautiful songs, and I think they're both just Mike Ackerfeldt and an acoustic guitar. Check em out.