Full Screamo:
Underoath
Haste the Day
Norma Jean
Devil Wears Prada
Gwen Stacy
August Burns Red
As I Lay Dying
All That Remains (debated, but singer is a Christian)
With Faith or Flames (Kind of underground, and not entirely sure
of religious beliefs)
In Fear and Faith
Old Killswitch Engage (from Alive or Just Breathing? and back,
singer was a Christian)
The Chariot
The Famine
The Empire Shall Fall (Singer from Killswitch's new band'
Inhale Exhale
Jesus Wept
Callisto (Sludge Metal)
xDisciplex (Jesus Wept, before they were Jesus Wept)
xDisciplex AD (xDisciplex, after they were xDisciplex)
Mortification
Ultimatum (Thrash Metal)
Torniquet (more shouting than screaming, but still good)
Seventh Angel (I might be confused with Seventh Avenue, but look
them both up!)
Burden of a Day
Advent
I Am Terrified
Becoming the Archetype
Alove for Enemies (that's how it's spelled)
blessthefall
Corpus Christi
Demon Hunter
Destroy the Runner
Chasing Victory
Extol
Hope for the Dying
Zao
War Of Ages
With Blood Comes Cleansing
We Came As Romans
Twelve Gauge Valentine (AMAZING!)
Still Remains
Spitfire
Soul Embraced
A Plea for Purging
Oh, Sleeper
Mychildren Mybride
Living Sacrifice
Not so much Screaming, but enough:
Stutterfly (also debated Christianity, but all of them are
Christians)
Before Their Eyes (Not "Christian" but all members are
Christian)
Dead Poetic
Emery
Far-Less (VERY underground band, singer is a Christian)
That is all I know, but there are a lot out there!