Acromantulas, bugbears, thestrals, unicorns, and your average deer or wolf. I have no idea if they're there, but the centaurs will leave you alone as long as you leave them alone.

I'd say the most dangerous are the Acromantulas. They're smart and there's a herd of them.

[This is of course the opinion of someone who could turn into a dog an avoid most of these dangers and doesn't think to mention others.]

I know it sounds great, but if this is one option I don't think the others will be much safer.