I’ll list a few of my favourite albums (I’d recommend these to almost anyone):
Abydos
Anathema
Judgement
A Fine Day to Exit
A Natural Disaster
Angel Dust
Bleed
Enlighten the Darkness
Of Human Bondage
Coldplay
A Rush of Blood to the Head
Dark Suns
Existence
Dream Theater
Images and Words
Metropolis: Scenes From a Memory
Six Degrees of Inner Turbulence
Train of Thought
Octavarium
Evergrey
Recreation Day
The Inner Circle
Green Carnation
Light of Day, Day of Darkness
The Acoustic Verses
Hans Zimmer
Gladiator (Soundtrack)
The Last Samurai (Soundtrack)
The Thin Red Line (Soundtrack)
Katatonia
Last Fair Deal Gone Down
Viva Emptiness
The Great Cold Distance
Lacuna Coil
Comalies
Karmacode
Nightwish
Wishmaster
Century Child
Once
Dark Passion Play
Pagan’s Mind
Enigmatic Mission
Porcupine Tree
Stupid Dream
In Absentia
Deadwing
Fear of a Blank Planet
Portal
Element
Redemption
The Fullness of Time
Origins of Ruin
Riverside
Out of Myself
Voices in My Head (EP)
Second Life Syndrome
Rapid-Eye Movement
Shadow Gallery
Tyranny
Legacy
Room V
Therion
Gothic Kaballah
Vanden Plas
Colour Temple / AcCult
The God Thing
Far Off Grace
Spirit of Live (live album)
Beyond Daylight
Christ 0 (favourite album ever!)
In this list you’ll find no death metal and very few harsh vocals at all. It’s mostly progressive, atmospheric and unique music.
So… yeah.