again im going by heritage birds, not the mixes that most hatcheries offer. rhode island reds are darker in color, typically smaller framed and a little better feed to egg ratio than the new hampshiers. overall yearly egg production is only different by 20 or so eggs, not that much of a difference at all. with the larger size of the new hampshiers they are usually lazier and dont fly as well. i have never seen a new hampshier red in a rosecomb- but they could exist?
maybe this is the best way to start, these breeds are known for aggressive roosters:
anything from gamefowl lines, rhode island reds, marans, wyandottes, easter eggers (depending on cross), olive eggers, orloffs, full blooded cornish (occasionally), and my buckeye roosters seem to be aggressive, but it could be the breeding.
docile breeds: cochins, silkies (not good layers), brahmas, plymouth rocks can go either way.
as a rule of thumb anything listed as a "broody breed" will usually be docile with exception of games. the smaller the breed, usually the more aggressive the roosters.
i keep listing games as aggressive, i love old english game bantams; for a chicken to be handled they are excellent if you start young. if you are going to keep 2 roosters together in old english you will have to raise them together. putting two adult roosters in a cage together will end in disaster.