Graphic - A possibility is a very minimalist approach - using outstanding traits / features of the band and their instruments to create a striking visual - eg. Anna's long hair and little nose paired with piano keys.
"Power to the People: POWER & EQUALITY," social protest for the rights of African-Americans in graphic design posters. Silk screen poster designed by Shepard Fairey. Bold colors, simple shapes, and the lines really draw the eyes inward.