Historical clue formulations

• Who said "I have a wonderful psychiatrist that I see maybe once a year, because I don't need it. It all comes out onstage" — 2014-09-27
• "Enter Talking" autobiographer, 1986 — 2007-04-04
• Comedian who once said, "My audiences are my group therapy" — 2002-06-08
• 1990 Emmy-winning talk show host — 1997-12-25