1983 and 1984 are right in the wheelhouse of what I consider to be the greatest period in hard rock/metal history -- in addition to the five albums in the poll:
Accept - Balls to the Wall
Anthrax - Fistful of Metal
Armored Saint - s/t and March of the Saint
Bon Jovi - s/t
Deep Purple - Perfect Strangers
Dio - The Last in Line
Dokken - Tooth and Nail
Fastway - s/t
Fates Warning - Night on Brocken (only really significant as the debut of a band that went on to do amazing things)
Grim Reaper - See You in Hell
Sammy Hagar - VOA
Iron Maiden - Piece of Mind and Powerslave
Judas Priest - Defenders of the Faith
KISS - Lick It Up (I don't like it, but still...)
Krokus - Headhunter
Yngwie Malmsteen - Rising Force
Mercyful Fate - Melissa and Don't Break the Oath
Metallica - Kill 'Em All and Ride the Lightning
Motley Crue - Shout at the Devil
MSG - Built to Destroy
Queensryche - s/t EP and The Warning
Raven - All for One
Ratt - s/t EP and Out of the Cellar
Saxon - Power & the Glory and Crusader
Slayer - Show No Mercy and Haunting the Chapel
Suicidal Tendencies - s/t
Triumph - Never Surrender and Thunder Seven
Twisted Sister - You Can't Stop Rock 'n' Roll and Stay Hungry
WASP - s/t
Whitesnake - Slide It In
Y&T - Mean Streak
Zebra - s/t
Etc., etc.
Edited because Thunder Seven ain't a Twisted Sister album!