Hair dye recommendations for Black hair

Hi, I have had grey hair ever since i was in my mid 20s. Never had an issue with it but lately it has started bothering me. So i want to start trying dyes. I have a full set of thick hair. I just don't want to ruin my mane by using cheap products. Kindly suggest some good hair dyes for natural black colour without harsh chemicals.

What all do the celebs use . I know it might be costly but just want to know what all hair colours do they use.