I dunno, here are some top ten (possibly underrated) characters I was thinking that I think deserves more attention and love.

10 - Millimochi and/or Snaquiri (Bugsnax)

9 - Ringtail slimes (Slime rancher 2)

8 - Wingo (Captain Toad)

7 - Glydon (Super Mario Odyssey)

6 - Everfore and Eterna (Yo-Kai Watch)

5 - Burgermon (Digimon)

4 - Sparky & Whoosh (Ribbit King/Frolf)

3 - Booboodori (Hebereke)

2 - Qui Qui (Qui Qui for the GBC)

1 - Urban Champ. and/or Urban Not-The-Champ. (Urban Champion)