Some epic climaxes (there are many, many more, but these were the first ones that came to my mind):
DT - 10.02 in In the Name of God, 5.57 in Honor Thy Father, 4.31 in Space-Dye Vest, "watch the sparrow falling" in Pull Me Under
Porcupine Tree - 6.16 and later 11.05 in Anesthetize (
), 5.31 in Strip the Soul
Paradise Lost - 3.56 in Over the Madness (dat solo!
), 3.24 in No Forgiveness, 4.28 in The Glorious End (the chorus is epic on the first time already, but the second chorus is simply one of the best moments in their entire catalogue)
Katatonia - 2.14 in Leaders, 1.46 in Dead Letters, 3.06 in Liberation, 3.32 in Brave, 6.52 in 12
Opeth - 5.45 in Hessian Peel, 5.34 in The Drapery Falls, 8.24 in Bleak, 4.08 in Ghost of Perdition
Chroma Key - 3.09 in Subway