Today I learned that, after Phil Hartman's death, the Simpsons staff considered casting Harry Shearer as the replacement voice actor for the character Lionel Hutz, but decided to retire Lionel Hutz instead.

https://en.wikipedia.org/wiki/Lionel_Hutz

https://www.reddit.com/r/todayilearned/comments/1562ofe/today_i_learned_that_after_phil_hartmans_death/