Roosters are a crap shoot, often times they do not work out, and really there is no fail proof way to say of a rooster chick, if he is this breed, and I treat him like... he will be a gentleman and a flock master.
If this is your first flock, I would recommend culling all your roosters, wait until your hens begin laying. Contact the feed store, the local poultry club or the county extension agent. I think you get the best roosters when they are raised in enough space, in a multi-generational flock. These birds are not the biggest bird in the flock and they learn the behavior needed to live in a true chicken society. What you are hoping to find, is a rooster that was so darn nice, that he has been kept as a spare.
Rooster chicks raised with flock mates rapidly become bigger than the pullets, are interested in sex long before the pullets are ready, and often times become rather a bully. These chicks are often the friendliest and loose all fear of humans, which with a puppy is a good thing, but with a chicken, not so much. Fear equals respect. These pages are filled where the darling became the nightmare. These roosters are often bullies and aggressive.
So, do not pick a breed, you have to really wait and see. You may want to separate them from the pullets, as they can be pretty aggressive. Wait and see, cull the ones you don't want first. Wait and see, cull again, wait and see, then make the final choice.
Be aware, that none of these roosters might work, it is a crapshoot, if they don't, look for a good rooster elsewhere. No need to breed a rotten temperament into the flock, no need to put up with a rotten rooster, especially when there are truly wonderful roosters out there.
Mrs K