Cow is a good answer for this one, although if it happens to land a kick, that might be a game changer.
I had to do some research on this one because I couldn't get "cow" out of my head as an answer. I think a panda would be a good one. I don't know that I could kill a panda with my bare hands, but I think it's too dumb and lazy to actually kill me. From what I found:
Because bamboo is so low in nutrients, pandas must eat it constantly in order to survive. That’s also why they are so stupid and lazy. With practically no protein or vitamins, bamboo is hardly brain food and it certainly doesn’t provide pandas with enough energy to get up and go. That’s part of the reason they only mate once a year in the wild –they just don’t have the energy to do it more often than that.