Most Helpful Guy
not a metalhead... but i know a few bands from 80s who were glam metal (aka hair metal) and they had "normal" lyrics and their songs were accessible to da main listener:
or twisted sister:
Most Helpful Girl
Just stay away from bands in the Death Metal and Black Metal genres if you don't want anything that deals with death or Satan.
I highly recommend checking out the following bands: Saxon, W. A. S. P, Accept, Stratovarius, Mastodon, Iced Earth, Blind Guardian, Ratt, Dio and Dokken.