There's so many guitar solos that are favorites of mine.
Iron Maiden- Alexander The Great, Children of the Damned, Hallowed Be Thy Name, Rime of the Ancient Mariner, Phantom of the Opera, Paschendale, and many more.
Judas Priest- Beyond the Realms of Death, The Sentinel, Blood Red Skies, Hell Patrol, One Shot At Glory, A Touch of Evil, and Painkiller.
Vital Remains- Dechristianize
Demons and Wizards- Fiddler on the Green
Led Zeppelin- Stairway To Heaven, Since I've Been Loving You, Dazed and Confused, and Whole Lotta Love
Metallica- Fade To Black, Master of Puppets(Interlude), Unforgiven, Call of Ktulu, Orion, To Live Is To Die, One, and Dyers Eve
Queen- Bohemian Rhapsody, One Vision, The Show Must Go On, Who Wants To Live Forever, Innuendo, Princes of the Universe, and Stone Cold Crazy.
Motley Crue- Home Sweet Home, Dr. Feelgood, Danger, You're All I Need, and Girls, Girls, Girls.
Pink Floyd- Comfortably Numb, Dogs, Echoes, Hey You, and Time.
Megadeth- Hangar 18, Holy Wars, In My Darkest Hour, My Last Words, She-Wolf(Live Extended Version), Tornado of Souls, Symphony of Destruction(Exended Live Version)and The Family Tree.
Slayer- Hell Awaits, Raining Blood, Angel of Death, Seasons in The Abyss, Dead Skin Mask, War Ensemble, and Kill Again.
Guns N' Roses- November Rain, Civil War, Don't Cry, Sweet Child O Mine, Coma, Estranged, and Paradise City