I got a whole playlist dedicated to power ballads. In the 80's, no credible hard/glam rock band could do an album without 2 or 3. Some I didn't catch mentioned already
Skid Row - Quicksand Jesus, Wasted Time
Heart - Alone
Damn Yankees - High Enough, Where you Goin Now
Whitesnake - Sailing Ships, Now You're Gone
Brighton Rock - One More Try
Giant - I'll See You in my Dreams
Warrant - Heaven
Tesla - What You Give
Steve Perry - Oh Sherrie
Black Crowes - She Talks to Angels
Halen - Can't Stop Loving You, Not Enough
And the ultimate ballad from The Bodyguard - I Will Always Love You