the clean vocals in Agalloch's "Not Unlike the Waves," "Fire Above, Ice Below," the climax in "The Hawthorne Passage." Fuck, basically all Agalloch has the potential to give me chills.
The resurrection part in Bathory's "Death and Resurrection of a Northen Son"
Kiuas's "After the Storm" when Ilja's sister just fucking WAILS, holy shit it never fails to give me chills. A lot of Kiuas like the Finnish chant in "Across the Snows," the climax in "...And the North Star cried."
The "Champion of Ithaca" part of Symphony X's "The Odyssey," and the end of "Candlelight Fantasia."
Clean vocal parts in Windir's "Heidra," "fagning," and "journey to the end."
clean vocal parts in Wintersun's "Starchild" and "Sadness and Hate," and the key change(s) in "Death and the Healing."