If you are going to tame one use a gillie suit and prone while you are feeding it and bring a lot of beer:-)
Chalicotherium
The Chalicotherium is a mammal commonly found in colder areas that many survivors find useful in battle. In the wild, Chalicotherium often playfully throw snowballs and mud rocks at each other, however, when tamed, they can be given boulders to throw at enemy structures.

Player-written tips for taming, using, and fighting the Chalicotherium in ARK: Survival Ascended & Evolved.