Here's the final Hangman. I'm currently in the process of going through all the submissions, so first impressions should arrive within the next couple of days.
??: Meshuggah
1: Future Breed Machine
2: Clockworks
3: Rational Gaze
4: Bleed
??: _____n _e___a___n
1: __e _ea__ _f E_e_____n_
2: __e _____
3: _n __e __ddle _f __e N____
4: _a_ad__e (__a_ Ab___ __?)
??: A_all___
1: _ A_ __e ___den D____
2: N__ _nl__e __e _a_e_
3: ______ _f __e __d__n_e_ F__e_
4: B____ and Dea__ _f __e __lla__ _f __ea___n
??: L___ D__a_n
1: __len_ ___
2: _nd_____
3: ..._n __e _a___n_ ____ _f Dea__
??: Mew
1: N____n_ne__ and N_ _e__e__
2: A___al____
3: _and_ __e_e_ All __ea_ed ___
4: Comforting Sounds
??: _____a_
1: ___ D_ _e L__e?/__en __e __a__ Al__n/__e __a__e _n __e __land
2: _n__de __e __d__nd/__e ___e_ Da__
3: _n ___an_e L____
??: Wintersun
1: Land of Snow and Sorrow
2: Darkness and Frost/Time
jingle.boy: Trans-Siberian Orchestra
1: A _ad _____an'_ _______a_
2: ___d __n_ ___
3: _ld ____ Ba_
4: _______a_ E_e/_a_a_e__ __/__
??: Angra
1: _a__l_na __
2: A__d _a_n
3: __e __ad__ __n_e_
4: E__ _a_n_ed __e_
5: ___e_ Le_el_
??: Periphery
1: Have A Blast
2: Ragnarok
3: Omega
??: _a____e A__a__
1: _nf_n___ed ____a___
2: _ea_d___
3: ____n___n
4: _a_e __ __e_e
??: _a___e___n_n_
1: F_ea_ ____
2: ____land
3: __ L_na___
4: L________e
??: Black Sabbath
1: ____al A_____e__
2: __e ____ll _f __ All
3: ___e_na__
??: The Pineapple Thief
1: In Exile
2: La__ _an __and_n_
3: Far Below
4: _____l_ ___nd
??: Unleash the Archers
1: __e ___a_d'_ _a_
2: N_____e__ _a__a_e
3: A_ex
??: Thank You Scientist
1: A Salesman's Guide to Non-Existence
2: FXMLDR
3: Psychopomp
??: _a_d_a__
1: __e __ __d_n_ Be__nd __e __ed
2: D__-L__e __a___
3: __e D___ and ___e_ __e ____e
4: D____ B__
??: Metallica (Live with the San Francisco Symphony Orchestra)
1: The Call of Ktulu
2: One
3: Hero of the Day
4: The Outlaw Torn
Guessed letters: D N L E B X F A