I generally don't have that problem with roosters from high production breeds of large egg layers tending to be angry non friendly roosters, but it is just a throw of the dice of what you get. With small kids I can understand your concern.
Genes come in pairs and the parents contribute one of the pair. That makes my phrasing a bit awkward but please bear with me.
A rooster contributes one gene of every pair he has to all his offspring, male and female. A hen does the same with her sons but withholds the sex-link genes from her daughters. For the sake of this conversation let's ignore the sex linked genes.
A rooster will contribute as many genes related to egg laying as a hen. A hen will contribute as many genes as a rooster toward the behavior and personality of her sons. If your good egg laying hens have a son, they are as likely to contribute topward his personality as his father. Since the rooster has a different function in the flock than the rooster, you might not be able to tell how her son will act as a rooster from her behaviors. Since a rooster does not lay eggs, it's hard to know what kind of egg productivity he may be contributing. Knowing his mother and grandmothers might help in that.
What I'm saying is that both parents contribute toward the traits of their offspring. If your Brahma comes from stock that are not great egg layers and your hens are great egg layers, their offspring are likely to be somewhere in between, with some of them better than others. You can correct that in a few generations by selecting the best egg layers to breed, but that takes a few generations. I'll also mention that some members of this forum have Brahmas that are really good egg layers but maybe you have a strain that is not.
Same with behavior. A cross between a docile rooster and a brute of a hen might produce a docile son or a brute. You can correct that by selecting your breeders in future generations, but behavioral things are harder and you have your kids to consider.
I probably have not made your decision any easier. I don't find most roosters of good egg laying breeds to be brutes, but I have had some that were introduced to the crock pot. There is no guarantee regardless of what you choose.