Answer:
well that's a tough question, but here's a few in alphabetical order with Band examples:
Alternative Rock - Seventh Day Slumber
Gospel - Gaither Vocal Band
Indie Rock - Deas Vail
Hardcore/Metal - As I Lay Dying, Norma Jean, August Burns Red
Praise and Worship - Hillsong, Desperation Band, New Life Worship
Punk Rock - Relient K
Screamo - Underoath, Emery
Southern Gospel - New Life Choir, Kirk Franklin
Hope this helps
-Zandrello