You could check out 'Penguin Highway'. It's a manga where the main characters are animals and it has a unique and charming plot. Also, 'Fruits Basket' has elements of animals and is quite popular. These mangas offer diverse and engaging stories with animal characters.
One popular manga with only animal characters is 'Beastars'. It has complex character development and an interesting story.
I'd recommend 'The Kingdom of the Cats'. It's a manga that focuses solely on cat characters and their adventures. Another good one is 'Dog Days', which is filled with cute and fun animal characters and their escapades. Both of these mangas are known for their interesting takes on animal characters.
One popular one is 'Kemono Jihen'. It has a sweet romance and unique characters with animal ears. The story is engaging and the art is great.
You might look into 'Bible Black'. It features only hentai male characters. However, it's very adult-themed and might not be to everyone's taste.
One popular manga with animal hybrids is 'Beastars'. It presents a complex world of anthropomorphic animals with unique storylines and character developments.
I'd recommend 'Kemono Friends'. This manga showcases cute and unique animal girls in a fun and adventurous setting. The art style is also quite appealing.
There's 'The Promised Neverland' which features human-like animals in a mysterious and thrilling setting. The plot keeps you on the edge of your seat.
One popular manga with animal people is 'Beastars'. It has a unique take on anthropomorphic animals and their complex social dynamics.
One manga with such characters is 'The Masked Beast Saga'. It has various creatures wearing animal masks and has an interesting story.
I'd say 'Spirit Animals' is an option. It combines human and animal elements in a way that's not overly complex. The plot and characters are straightforward to follow.
One popular manga with animal ears is 'Usagi Drop'. It has cute characters with animal-like features, including ears.
One popular manga is 'Inuyasha'. It has characters with animal ears and an engaging story.