Off the top of my head at 2:30 in the Morning
1920s-1930s: Ruth Etting, Bessie Smith, Ma Rainey, Beatrice Lilly, Mae West, Sophie Tucker, Marion Harris, The Boswell Sisters
1940s-1950s: Billie Holiday, Eartha Kitt, Lena Horne, Patti Page, Peggy Lee, Sarah Vaughan, Astrud Gilbert, Patsy Cline, Big Mama Thornton, Etta James, Ella Fitzgerald, The Andrew Sisters, Betty Carter, Brenda Lee
1960s-1970s: Janis Joplin, Grace Slick, The Supremes, Mary Wells, Aretha Franklin, Loretta Lynn, Leslie Gore, Martha and the Vandellas, The Crystals, The Ronettes, Dusty Springfield, Lulu, Betty Davis, Phoebe Snow, Laura Nyro, Carol King, Patti Smith, Joni Mitchell, Judy Collins, Joan Baez, Dolly Parton, Donna Summer
1970s-1980s: Olivia Newton-John, Heart, Debbie Harry, Madonna, Sinead O'Connor, Joan Jett, Pat Benatar, Linda Rondstadt, Berlin, The Waitresses, The Pointer Sisters, Grace Jones, Kim Carnes, Souixie and the Banshees, The Indigo Girls, Tracy Chapman, The Eurythmics, Yaz/Alison Moyet, Melissa Etheridge, k.d. lang, Salt n Pepam, The Go-Gos
1990s: Garbage, Moloko, No Doubt, Tori Amos, Shawn Colvin, Suzanne Vega, Michelle Shocked
Harumph...I have to go to bed and get up in a few hours. But that's a few random folks.