I voted "None of them...".
Although, I actually HAVE been stalked by a mountain lion, for 45 minutes. And I actually maintained eye contact with that bad boy for most of that time. It WAS a bit disconcerting, I'll admit. But when all was said and done, I just thought that was literally like the coolest experience EVER and I'm thankful for it.
Of the animals you list though, definitely, by far, the one that gives me most pause is the moose.
Black bears... Bah... Whatever... Always glad to see them. I know, they can, do, have and will again attack and even kill, but they simply do not concern me very much. Put it this way, I had one in my bowhunting camp last year that woke me up one night. After I yelled at it and threw stuff and my dog ran around barking at it and it still was just kind of sniffing around the edges of camp, I went back in my tent and was able to go back to sleep fairly quickly. I have had equipment damaged and food stolen by black bears a few times, I had one scare the bejeezus out of me when we surprised each other at close range on a pitch black dark night once and I don't think I've ever run so fast for so long in the mountains, I do respect them, don't want to sound like I don't. Just they don't worry me much.
Coyotes... harmless.
Moose... unpredictable, potentially dangerous, but generally not something I worry about at all.
People are by FAR the animals that worries me most! I don't carry a gun backpacking simply because I don't see enough people when backpacking to make me feel like I need one.
- DAA