oh man, i could go on for days about this! there are so many wonderful characters that don't get recognition! My personal favorites are: Pango, Agnes and Cherry.
Out of my favorites, I'd say Vesta, Hopper and Elise. Vesta is the only sheep who actually does look like a sheep and she has the best personality imo (normal), Hopper is different from all the other penguins because he's based on rockhopper penguins and looks really cool, and Elise is a Marilyn Monroe wannabe with hipster glasses, how great is that?
Other than those three villagers, I think that Drake, Celia, Papi, Boone, Deli, Pietro, Tucker and Graham are all very cute and/or particular and get often overlooked for no reason.
Last time I checked, Aurora was a Tier 5. How. How is the adorable little baby a Tier 5. Aurora deserves all the love.
And there's large groups of certain villagers who deserve more love in general like the alligators (in particular male ones) deserve a lot more love than they get.
I was playing hide-and-seek on the island and saw Pippy, Ive never seen or heard of her before but she's a very cute bunny that I want to get now. I hope she moves in close to Bonbon.