I think my order is:
70s (Motown, Philly International, Jackson Five, Earth, Wind & Fire, Bill Withers, Curtis Mayfield, P-Funk, Aretha, James Brown, Isley Brothers, Rufus and Chaka Khan, Al Green, Donna Summer, Stevie. Wonder, Natalie Cole, Rick James, Commodores, Chic, Michael Jackson, Prince)
60s (Motown, Stax, Sly & the Family Stone, Aretha, James Brown, Otis Redding, Marvin Gaye, Stevie Wonder, Temptations, The Supremes, The Impressions, Ike and Tina Turner)
80s (Michael Jackson, Prince, Whitney Houston, Luther Vandross, Anita Baker, Freddie Jackson, Chaka Khan, Lionel Richie, Gap Band, Rick James, Teena Marie, Keith Sweat, Sade, Tina Turner, Solar Records, Janet Jackson, Patti LaBelle, Pointer Sisters, Jam & Lewis)
50s (Ray Charles, Chuck Berry, Little Richard, Fats Domino, James Brown, Frankie Lymon, Isley Brothers, The Platters)
90s (LaFace, Uptown, Mary J Blige, Keith Sweat, Lauryn Hill, Mariah Carey, SWV, D'Angelo, R Kelly, Boyz II Men, Jodeci, Janet Jackson, Maxwell, Aaliyah, Erykah Badu, Aaliyah, TLC)
00s (Alicia Keys, Usher, Destiny's Child, Beyonce, Mariah Carey, Pharrell, John Legend, Rihanna, Keyshia Cole, Andre3000, Jill Scott)
10s (Chris Brown, Bruno Mars, Rihanna, Beyonce, The Weeknd, Drake, SZA)