Folk metal
Pure folk -> Slania (Eluvetie)
	https://www.youtube.com/watch?v=DvBFgAhCkEQ&ab_channel=TheSymphonicDarkness
Good blend -> Siraxta (Eluvetie)
	https://www.youtube.com/watch?v=ITFXX_Zof3w&ab_channel=M4nny666
Pipes / Hurly Burly -> Neverland (Eluvetie)
	https://www.youtube.com/watch?v=0Fd7Xhr6glY&ab_channel=sylakopenair
	Because, live.
Just, the freaking range in voice. -> Alesia (Eluvetie)
	https://www.youtube.com/watch?v=LU-5c_LsTHU&ab_channel=AchiCon

Progression from Acoustic to full metal over two songs
Celestial Bond, Star Queen -> Ensiferum
	https://www.youtube.com/watch?v=UCZht7hExKI&ab_channel=Pale8394

Instrumentals
Titan (Anup Sastry)
	https://www.youtube.com/watch?v=8WvRGUiRGoo&ab_channel=asdrummer2008
		Just the opening song. This is the full EP.
Mata Hari (Intervals)
	https://www.youtube.com/watch?v=jtrFLzYIteY&ab_channel=ShapeshiftedCow

Technical accuracy / progression
Opticks (Chronographs)
	https://www.youtube.com/watch?v=G76QWfcV-44&ab_channel=GhostMusicLabel

Progressive Build
10,00 Days (Wings, Pt. 2) - Tool --> Don't skip ahead. Just ride it out. Make sure you've got good bass. Maynards voice deserves it.
	https://www.youtube.com/watch?v=Wc2rkbnO4uQ&ab_channel=shineonthirdeye


That Beatles song:
In spite of all the danger
Written by Paul McCartney, he's released it on one of his albumbs, but its technically pre-Beatles.
https://www.youtube.com/watch?v=RuuOAA9ekbg&ab_channel=beat68