Coyotes aren't super big and alone are pretty timid and rarely approach things bigger than it (like an adult human). Though when starving or other certain conditions drive them to approach larger animals or big open space (I.E. in a pack, or rabies), be mightily wairy.
(This is anecdotal experience only, please take it and reference it as such only)
Eurasia has grey wolves in that general role, although in some substantial areas like the United Kingdom, Japan, and southern China they've been extirpated completely