>AOTS
Shoushimin
>Runner-up
Ninkoro

>S
Uma, Hibimeshi, Apoc
>A
Gundam, Yaiba, Witch Watch
>B
mono, Kowloon, To Be Hero X, Aharen
>C
Vigilantes, Rock Wa Lady, Lazarus

Year long (at least I assume so for Princess) so not sure if it counts but Princession is around a B and Kimi to Precure is an S or so. Very strong season, any one of the S shows with fierce competition for AOTS. Honestly once the final Ninkoro episode ends it might be my AOTS but Shoushimin is just too good.