This made me laugh out loud, but I guess it only makes sense.
We will have a small flock (4 to 6) of hens with no plan to add a rooster. Do we need to to keep them less aggressive? Are some breeds softer crowers? Silly question I'm sure.
Lots of pros & cons about adding roos. If your flock is always contained in a predator proof coop/run & you're not interested in breeding, then there's no reason to add a male. Best to work on the bully female or get rid of her.
If you want to free range & it's legal for you to own a rooster, then there are plenty of good roos out there. I love my English Orpingtons. They are so calm with a lower pitched crow. I put them in the garage at night so we don't hear them in the early morning & let them outside at 8am. They crow a few times (1-4 min) when I put them outside & are generally quiet throughout the day - unless there's a perceived threat. Their big size deters many predators and they're people friendly. We don't baby & cuddle them like the hens, but they let us bend down & pick them up without fuss.
Cons: The crows of some can be loud & carry. I am sensitive to noise, so I find the lower pitched boys more soothing. (Smaller breeds like silkies & OEG have a higher pitched shrill noise. The smaller may have less volume but they seem to crow more frequently to each other throughout the day. Another thing to consider is size. If you have small breeds like silkie hens, a giant orp may harm her under his weight.
Here was our all-time fav rooster. He knew he was too big to mate the bantam - our Sebright - but he still guarded her & any chicks with no benefit to himself.