This makes me wonder what animals wouldn't be boring options for you?
I'll say this again:
Stuff that WE DON'T ALREADY HAVE.
We already have a domestic cattle breed that lives in the mountains, which is why I would never want a yak.
We already have like 6 bears.
We already have Dall sheep, Ibex, Takin, and now we're getting Markhor, which is why I think something like a Barbary sheep would be boring.
We already have llama AND alpaca, which is why I'd hate to get a vicuna or guanaco.
Himalayan Monal is kind of a boring bird and I don't really see myself building whole habitats just for that, but oh well at least it's the only vaguely interesting animal that has been suggested here.
(Marmot is an animal I heavily dislike IRL plus it's just a beaver stripped down of its most interesting features, that is swimming and building dams.)