What if the series highest score never dropped? Here is the list of top 50 series with the highest score that they ever had on MAL
Source: Wayback Machine
Anime: https://animenew.net/stacks/44849
Manga: https://animenew.net/stacks/44862
TV, 2017, 12 eps Me:- Author:8
Highest Score: 9.49 - 8th January 2017
TV, 2011, 51 eps Me:- Author:8
Highest Score: 9.48 - 22nd April 2011
Movie, 2016, 1 ep Me:- Author:9
Highest Score: 9.40 - 11th September 2016
TV, 2023, 28 eps Me:- Author:10
Highest Score: 9.39 - 25th March 2024
TV, 2023, 11 eps Me:- Author:9
Highest Score: 9.38 - 13th April 2023
TV, 2015, 51 eps Me:- Author:9
Highest Score: 9.33 - 1st April 2016
TV Special, 2017, 7 eps Me:- Author:10
Highest Score: 9.32 - 24th August 2017
TV, 2018, 22 eps Me:- Author:10
Highest Score: 9.30 - 6th January 2018
TV, 2017, 26 eps Me:- Author:6
Highest Score: 9.29 - 7th October 2017
TV, 2009, 64 eps Me:- Author:10
Highest Score: 9.26 - 22nd October 2015
TV, 2018, 13 eps Me:- Author:8
Highest Score: 9.26 - 31st December 2017
TV, 2022, 13 eps Me:- Author:-
Highest Score: 9.24 - 11th October 2022
TV Special, 2023, 2 eps Me:- Author:-
Highest Score: 9.24 - 4th March 2023
TV, 2019, 10 eps Me:- Author:9
Highest Score: 9.23 - 1st July 2019
TV, 2020, 16 eps Me:- Author:8
Highest Score: 9.22 - 6th December 2020
TV, 2012, 13 eps Me:- Author:8
Highest Score: 9.22 - 25th October 2012
Movie, 2013, 1 ep Me:- Author:-
Highest Score: 9.21 - 22nd January 2013
TV, 2011, 24 eps Me:- Author:10
Highest Score: 9.19 - 6th April 2015
TV, 2018, 12 eps Me:- Author:7
Highest Score: 9.19 - 11th January 2018
TV, 2018, 23 eps Me:- Author:8
Highest Score: 9.19 - 11th April 2018
TV, 2021, 13 eps Me:- Author:10
Highest Score: 9.18 - 29th June 2021
Movie, 2016, 1 ep Me:- Author:6
Highest Score: 9.17 - 27th May 2017
Movie, 2021, 1 ep Me:- Author:7
Highest Score: 9.17 - 19th August 2021
TV, 2022, 13 eps Me:- Author:-
Highest Score: 9.17 - 27th June 2022
TV, 2008, 24 eps Me:- Author:-
Highest Score: 9.16 - 13th April 2013
TV, 2016, 10 eps Me:- Author:-
Highest Score: 9.16 - 11th December 2016
TV, 2020, 12 eps Me:- Author:9
Highest Score: 9.16 - 6th February 2020
TV, 2022, 12 eps Me:- Author:7
Highest Score: 9.16 - 8th February 2022
Movie, 2010, 1 ep Me:- Author:8
Highest Score: 9.15 - 6th February 2011
TV, 2011, 148 eps Me:- Author:10
Highest Score: 9.15 - 10th January 2015
TV, 2017, 13 eps Me:- Author:7
Highest Score: 9.15 - 3rd October 2017
TV, 2018, 39 eps Me:- Author:-
Highest Score: 9.15 - 15th August 2018
TV, 2016, 39 eps Me:- Author:-
Highest Score: 9.14 - 1st April 2016
TV, 2016, 12 eps Me:- Author:8
Highest Score: 9.14 - 1st March 2016
TV, 2018, 24 eps Me:- Author:8
Highest Score: 9.14 - 16th January 2018
OVA, 1988, 110 eps Me:- Author:10
Highest Score: 9.13 - 21st April 2012
TV, 2006, 201 eps Me:- Author:8
Highest Score: 9.12 - 25th April 2011
TV, 2017, 22 eps Me:- Author:9
Highest Score: 9.11 - 11th April 2018
TV, 2022, 12 eps Me:- Author:7
Highest Score: 9.09 - 19th April 2022
TV, 2015, 12 eps Me:- Author:10
Highest Score: 9.07 - 25th December 2015
Movie, 2008, 1 ep Me:- Author:9
Highest Score: 9.06 - 10th February 2009
TV, 2018, 14 eps Me:- Author:6
Highest Score: 9.06 - 14th July 2018
TV, 2007, 27 eps Me:- Author:9
Highest Score: 9.03 - 27th October 2007
TV, 2017, 12 eps Me:- Author:7
Highest Score: 9.03 - 3rd October 2017
TV, 2020, 13 eps Me:- Author:-
Highest Score: 9.03 - 12th January 2020
TV, 2022, 12 eps Me:- Author:-
Highest Score: 9.03 - 12th October 2022
TV, 2012, 12 eps Me:- Author:8
Highest Score: 9.02 - 26th April 2012
TV, 2019, 13 eps Me:- Author:8
Highest Score: 9.02 - 3rd April 2019
TV, 2022, 12 eps Me:- Author:-
Highest Score: 9.02 - 26th December 2022
Movie, 2006, 1 ep Me:- Author:-
Highest Score: 9.01 - 16th August 2007