Historical clue formulations

• Cartoon character who said "Van Gogh would've sold more than one painting if he'd put tigers in them" — 2023-03-26
• Calvin's tiger companion, in the comics — 2022-01-24
• Paper tiger? — 2021-01-26
• Imaginary tiger friend in the comics — 2017-02-28
• Comic strip tiger — 1997-10-16