There's an adorable show called Pecola created by Naomi Iwata. It looks like a sunny Minecraft world populated with anthropomorphic animals, though it predates Minecraft by about six years, and stars a mischievous, titular penguin boy. The only mildly creepy thing about it is when the animation editors miss a slip-up, otherwise it's cute and upbeat.
Iwata also created a show called Gregory Horror Show (sic) which is... not as cute. While it occasionally has some humor, overall it has a very "Hotel California" vibe. Extra creepy is the fact that it has a similar visual style to Pecola, and both have elder rat characters.
The first two seasons of the latter are worth looking at on their own, but you could get whiplash from watching episodes of both shows back to back. There's also a manga and PS2 game of the latter, though the manga is not in the same style.
Edit: fixed some sentence order and redundancy, I blame Daylight Saving Time