Probably a capybara, or a cheetah. Both are rather chill animals, and cheetahs are fairly able to be domesticated (and have been multiple times throughout history) at least compared to other big cats.
Both are still a really bad idea, and the latter will probably result in injury or death. After having interacted with two Cheetahs through a rehab centre, I'd be open to try.
Probably a capybara, or a cheetah. Both are rather chill animals, and cheetahs are fairly able to be domesticated (and have been multiple times throughout history) at least compared to other big cats.
Both are still a really bad idea, and the latter will probably result in injury or death. After having interacted with two Cheetahs through a rehab centre, I'd be open to try.