Thanks for the info, everyone, there are some ones I wasn't aware of in there. Still, it hasn't changed #1!
41. Frank Oz as Bert
40 years, 2 months, 11 days
FA: Sesame Street 1.1 Nov. 10, 1969
LA: Sesame Street - “The Planet G” Jan. 21, 2010
40. Frank Oz as Yoda
40 years, 5 months, 29 days
FA: The Empire Strikes Back May 21, 1980
LA: Star Wars: Tales from the Galaxy’s Edge Nov. 19, 2020
39. Mel Blanc as Pepe LePew
Ca 41 years
FA: Odor-able Kitty Jan. 06, 1945
LA: The Bugs Bunny and Tweety Show 1986
38. Frank Welker as Scooby-Doo
41 years, 9 months, 9 days
FA: Scooby Goes Hollywood Dec. 23, 1979
LA: Scooby-Doo and Guess Who? - “Scooby-Doo and the Sky…” Oct. 01, 2021
37. Sylvester Stallone as Rocky Balboa
42 years
FA: Rocky Nov. 21, 1976
LA: Creed II Nov. 21, 2018
36. Harrison Ford as Indiana Jones
42 years, 18 days
FA: Raiders of the Lost Ark Jun. 12, 1981
LA: Indiana Jones and the Dial of Destiny Jun. 30, 2023
35. Mel Blanc as Foghorn Leghorn
42 years
FA: Walky Talky Harvey Aug. 31, 1946
LA: Bugs Bunny’s wild World of Sports Feb. 15, 1989
32. Harrison Ford as Han Solo
Carrie Fisher as Princess Leia
Dennis Lawson as Wedge Antilles
46 years, 6 months, 23 days
FA: Star Wars May 25, 1977
LA: Star Wars: The Rise of Skywalker Dec. 20, 2019
31. Majel Barrett Roddenberry as the Starfleet Computer
42 years, 6 months, 25 days
FA: Star Trek - “Mudd’s Women” Oct. 13, 1966
LA: Star Trek (film) May 08, 2009
The Mel Blanc ones aren't entirely accurate. I'm finding it difficult to nail down his final appearances as each character.