Historical clue formulations

• Thelma's road trip partner — 2019-08-04
• Title heroine of a Gustave Charpentier opera — 2012-09-16
• New York congresswoman Slaughter — 2008-07-26
• One of TV's Jeffersons — 2001-04-13
• 1991 buddy film "Thelma & ___" — 1997-11-24
• Charpentier opera or its heroine — 1997-03-02