where i live in Canada we have very few foxes so i have no idea how bad they are, due to the fact we have so many coyotes there to the point its open season year round, and for us trappers there worth a lot of money
raccoons are really bad, smart and strong, i just trapped a 30 lb coon a few days ago. (yes i weighted it) they have killed a few flocks of my grandparent's chickens years go.
weasels not sure i just trap them during season but there blood thirsty.
mink are just really a bigger water weasel caught one last year trying to get into our coop, lot of people have mink issues here.
but then we also have the odd cougar, bear (black), lynx and bob cats, fisher etc... all fun for keeping animals oh also a pack of wolfs where spotted in my area a few weeks ago lol.