I've been sifting through Heart power ballads the last couple of days...
https://youtube.com/watch?v=nLYcRzXv3rA - "Alone"
https://youtube.com/watch?v=7LLaeRUsWr0 - "These Dreams"
and if you wanna go back a bit further, for something quite different... seems they changed direction quite remarkably in the 80s, here's a 70s offering...
https://youtube.com/watch?v=4bt_-R5LInU - "Barracuda"