I've thought about this kind of question for a long time. I reckon I can beat up about 85% of the world's population. I am a large man with quite a bit of experience fighting, none in a ring or a cage.
Camels are large, notoriously ill-tempered creatures. I wouldn't, personally, want to get too close to one. My Dad rode a camel in Egypt and did not recommend it.
Most people would struggle to might a medium-sized dog and a horse would be unwise. A camel would be out of pretty much everyone's ability to fight.