At the same time, I'm thinking along the lines of the Hush Sound having Greta Salpeter and Bob Morris.
Correction, "some bands"

The Eagles had a few different singers. Glenn Frey, Joe Walsh and Don Henley all take the lead at different points. A few hits that Glenn Frey sang on were "The Heat is On" from Beverly Hills Cop, "The One You Love", and "You Belong to the City" from Miami Vice. Joe Walsh had a few hits to, most notably, "Rocky Mountain Way", "Ordinary Average Guy", and "Funk 49" from Lords of Dogtown. Don Henley had the lead for the hits "Heart of the Matter", "All She Wants to do is Dance", and "End of the Innocence".

Underoath
Atreyu
Lacuna Coil

Madness and The Specials????