My 3 favorite bosses have been 2 black females and 1 white female.
My worst boss what a white dude that hit on me until I shut him down and then he never talked to me again and an Indian male who told me "women should be at home taking care of the children" (that was 1 year ago).
I had a okay white male boss tell me I was the most qualified for the job but with an infant he didn't think I could handle the job (that was in 1999), he eventually saw the error in his ways and promoted me 5 years later.

(Sad that he was not the worse)
The rest have been okay. Nothing stellar.