[To read an introduction to The Greatest Voices Project, click here.] [To see earlier installments, follow these links: #50-#46 … #45-#41 … #40-#36 … #35-#31.] ————————- #30: Ann Wilson The powerhouse voice behind the group Heart, Ann Wilson is far more than just a rock and roll singer. Ann’s soaring voice and strong persona made audiences want to hear her sing more and more. From the classic album “Steamboat Annie” through power ballads from the 1980s, Ann Wilson’s voice along Nancy Wilson’s backing and guitar work, made Heart an undeniable musical group. One of Heart’s greatest traits was the ability to choose songs that fit Ann Wilson’s high register, but…