29. Roseanne Barr
Roseanne Barr revived her iconic working-class voice with the 2018 *Roseanne* reboot, pulling in massive ratings and proving she was still a television powerhouse after decades away. ABC had big plans for multiple seasons and spin-offs built around her no-holds-barred comedy.
On May 29, 2018, Barr tweeted a racist comparison about Obama advisor Valerie Jarrett. ABC canceled the reboot the same day, and her agency dropped her. The comeback that had networks celebrating turned into instant exile. A potential multi-year TV renaissance ended before it could truly begin.
