There's only two breeds the KC and most vets recommend to be good with children, the Staffie and English Mastiff.
The staffie is known as the Nanny dog because if it's gentle nature with children.
Unfortunately the wrong end of the lead gets the blame most of the time.
We had staffies when I was younger and living with parents and my sister has had them for all her adult life(54) in fact I can't remember her not ever having one and I've never known them bite anyone.
Unfortunately a breed becomes fashionable with chavs and the breed suffers. 20 years ago it was the Rottweiler, before that the Doberman, Alsatian etc etc