Asklemmy

Some niche ones:

In the book series Warriors by Erin Hunter (AKA Warrior Cats), there's a cat named Brambleclaw/Bramblestar. He's the leader of the clan of cats that most of the stories are written from the perspective of. He abuses his mate (poor Squirrelflight), is stubborn, manipulative, and has also trained in cat hell with his evil father. Here's a video that breaks down his actions: https://www.youtube.com/watch?v=pAv-CTp2AoQ

From the same series as above, we also have the (dis)honourable mentions of Breezepelt, Spottedleaf, Tigerheart/Tigerstar the second, and Bluefur/Bluestar. If anyone is curious about any of these, feel free to ask me to elaborate.

Not a protagonist but still considered a good character in canon for some reason: in the first Pokemon Mystery Dungeon game, Red Rescue Team/Blue Rescue Team, a Ninetales curses a human for a thousand years for touching their tail. They also have no problem with cursing the human's Pokemon companion instead when she offers to take his place. Also in the game, said Ninetales is generally really self absorbed and thinks there's absolutely nothing wrong with what they did, even though it's causing havoc within the Pokemon world which could all have been avoided if he didn't react so extremely. They're never called out for this by the other canonically good characters either.