I experienced the same in my company. How I solved it: 1. Confrontation. 2. Talking to managers and tell them I would leave. 3. Giving him the attention and g

I experienced the same in my company. How I solved it: 1. Confrontation. 2. Talking to managers and tell them I would leave. 3. Giving him the attention and greet him when he wanted to do something good. 4. Hear his opinion. 5. Remind him my role when power argument arise. 6. Indifference and segregation also worked well. The company started to avoid him. If none of these calm him, then I would simply leave. There´s no need to gift life and sanity for a jerk.