I don't think I can think of many mythical creatures that wouldn't either murder shit tons of people ruin the world. I mean, golems is leading to a fucking apocalypse where whoever figures out how to churn out golems the quickest is taking over in a military dictatorship, this "I get to be the only wizard!" thing is drivel and everything else would just be another pest or another threat to my life. There's no wolves or bears or shit in my country, I don't want to have to suddenly deal with centaurs coming out and murdering the shit out of me.
I guess mermaids, because I could sail around, kill one and gain immortality. I guess there'd also be a bunch of Asians with immortality, but I'm not scared of them, they'd kill each other for power and their struggle would be confined to Asia, because being immortal doesn't make you particularly powerful in regards to stopping a gunshot.