Humans.
Humans are the only animals that can even be considered evil despite the fact that humans already are evil. Our intentions is what makes us evil. We are emotionally complicated and, therefore, easily corrupted emotionally.
Unlike humans, other animals' survival depends on their instinct. Our survival is unfortunately based on emotions which causes us to be evil.
The phylum Chordata is considered to be the closest relative to humans. Within Chordata, the subphylum Vertebrata, which includes animals with a backbone, is the most closely related to humans.
Homo rudolfensis likely had a diet consisting of a variety of plant-based foods such as fruits, seeds, and tubers, as well as some meat from scavenged sources like small animals. Their diet was likely based on what was locally available in their environment.
Neanderthals used a variety of tools such as spears, clubs, and thrusting lances to hunt large animals. They likely hunted in groups, coordinating their efforts to take down prey. Evidence suggests they were skilled hunters capable of ambushing or outrunning their prey.
Neanderthals were primarily meat eaters, consuming large game such as mammoths, deer, and bison. They also likely supplemented their diet with plants, berries, nuts, and other seasonal fruits. Their diet was based on what was available in their environment.
Homo floresiensis, also known as "hobbits," were believed to have hunted small animals like pygmy elephants, giant rats, and komodo dragons on the Indonesian island of Flores. They also likely foraged for plants and fruits to supplement their diet.
humans are the most evil animals on the planet
Animals never became "evil".
He wasn't considered evil. The Greeks didn't define their gods as "good" or "evil". He was associated with darkness, which WE associate with evil.
None
Oh, dude, animals aren't inherently evil, they're just doing their thing in the circle of life, ya know? But if you want some creatures that might give you the heebie-jeebies, you could think about like sharks, snakes, or maybe even those sneaky raccoons that get into your trash. But hey, they're just living their best lives, man.
Cats are not evil but there have been times in history when they have been considered evil.
No, bats are not evil. Neither are frogs, locusts, or any other animals mentioned in The Bible. They are God's creations and they serve a purpose. They may cause trouble sometimes, but the animals themselves are not capable of evil. Only humans are capable of evil.
Usually dragons are considered evil demons because they steal sheep and other domesticated animals. They also burn villages.
An aggressive predator, but not considered evil, for they are just fish.
Evil animals, like evil spiders and rats
All creatures including human beings are ruled by spirits. Animals are 100% under the control of the spirits but humans are not. Humans can choose their spirits as they like. But after they have chosen the spirits, those spirits will rule the human beings. It's a God made system. All creatures' (including human beings) nature depends on the possession of the spirits. Animal spirits cannot think like human beings unless they are tamed and well practiced by humans even then it is risky. Animals’ migration caused by the spirits. Spirits can predict the catastrophic events before they occur. They can make the animals go from one place to another place by controlling their minds. Spirits can control humans’ minds too but they can’t do as they do with the animals, that’s why God has given science to human beings. God's direct intervention in individuals' affairs is very rare. God doesn't watch each and every human being at the same time and cannot live with each and everyone to guide them. These works are done by the spirits. God had created different kinds of spirits for various purposes. He had made the spirits to watch, guide and determine the destiny of the human beings from their daily activities, talks and thoughts too. Your past determines your present and your present determines your future. God has given freewill to all creatures including human beings. According to this, all human beings have all right to live a life as they wish. But if it happens to be bad and hurts someone, they have to face the consequences. These consequences are created by spirits. It's a natural system. After death no one lives in any form. Heaven and hell are only for spirits, not for human beings. God is a mystery even to the spirits. Spirits are not eternal beings but their lifetime is long. Spirits are separate elements. A human being during his/her lifetime is living with many spirits which have joined one by one since birth. They are knowledge, skills, feelings, emotions, instincts, interests and everything. Further there will be always some spirits with you on behalf of your parents, friends, relatives and Gods you believe. Only these spirits make you remember them in a certain situations. All of these spirits are your consciousnesses and memories. Even thoughts are not your own. For example, when you want to take a decision on a subject, one after another the spirits think and you just listen, choose or reject the ideas which they transmit to your mind through your brain in the form of thoughts. A mind is a group/formation of many spirits which have joined one by one since birth. A mind is just like a computer's mind. After the computer is completely destroyed you will not get its mind. The same is the case with the human beings. A brain is a device used by the spirits to control the body and mind. (A senior spirit or a chief can control other spirits) A human being doesn't have a spiritual body. Soul is an energy needed for the functionality of a body. It is not a spirit or anything else. A body's functionality is based on the auto mechanism. After death all spirits which accompanied a person quit and go to different places searching new bodies. No one lives after death in any form. All human beings are just robots made of flesh and bones and toys of the spirits for their games.
The ancient Egyptian deity that was considered an Evil serpent of the Underworld is Apophis.