So your overall goals are eggs, general amusement, and hatching eggs. How important is meat to you? One of my goals is meat but since there are only two of us we can make a meal or two out of a fairly small chicken. Figure out what you are going to do with a lot of eggs. You are going to be buried in them in a few months. I generally give mine away to a friends, relatives, or a food bank. Some people sell them.
We all have our own preferences in about everything. That can be how we feed or manage them, what breeds or colors/patterns we prefer, or how we cook them. As chickens age the meat gets more flavorful and the texture changes, cockerels especially when the hormones hit. Some of us like that, some don't. You have to cook them in an appropriate way for their age. I personally like to butcher a cockerel at 23 weeks or so, but I don't fry or grill them. The meat would be too tough. Sometimes the best way to figure out what works best for you is trial and error. How much freezer space do you have? That may determine how many you can butcher at a time. All kinds of variables that make us unique.
You don't have hens and roosters yet, you have pullets and cockerels, totally different critters as far as behaviors. It sounds like puberty has not hit most yet, at those ages it soon will. It is really challenging to tell what the behaviors will be when they mature as maturity can bring a calming effect. To make it a lot more difficult the dominant males suppress the behaviors of the less dominant. Behaviors can totally change if you remove one that was restraining others or as they mature.
When the hormones start flowing in the cockerels as they go through puberty it can get really rough down there. They usually fight each other a lot to establish dominance. If you have a lot of room they usually don't hurt each other that badly but one can get seriously injured or even die. Having the room you do really helps. The cockerels also tend to try to mate the pullets or sometimes be rough with them to establish dominance. The pullets have not matured enough to accept a mate and don't want to be dominated, so they usually try to escape. It can get really rough when they go through puberty. If you can make it through this stage it will eventually calm down as they mature, but some people can't make it through, it can be that rough.
I usually let my cockerels and pullets grow up with the flock until my 23 week butcher age. I don't separate them, even when I may have more than 3 times as many cockerels as pullets. But sometimes the cockerels are so bad I do isolate them in a bachelor pad/grow out pen until butcher time. That can happen when I have a lot more pullets than cockerels. I don't believe in specific male-female ratios, from what I've seen they don't mean much. Still I suggest you keep as few males as you can and still meet your goals. You are not guaranteed problems with more roosters but problems are more likely the more you have. I agree, having a pen ready so you can isolate cockerels (or other chickens) if the need rises is a great thing. The more flexibility you have the less stressful for you.
If you read enough threads and posts on here you will find that no matter the breed (Silkie, Orpington, Sussex, RIR or anything else) you will find some individuals that are pure brutes, some that have great personalities. I personally don't believe that breed is that much of an indicator of how any will behave or how productive they will be, especially if you don't have enough for averages to mean much. Some people seem to think that RIR's are the devil incarnate, others are extremely happy to have them in their flock. If you want to avoid RIR because some people don't like them, fine, that's your choice. It may be a good one. Or you can take the trial and error approach and see how you feel about it. You can eat pullets and hens too if you have a need.
I don't know enough of what might be important to you as far as color/pattern of the feathers, egg shell color, size for butchering, or other traits that might point you in a certain direction as far as which males and females to keep. Without knowing your goals better, I don't see any good or bad pairings. My general suggestion is to see which ones you are happiest with and breed those. When we know the color/pattern of the parents and which is the mother, which the father we can often tell you what color chicks to expect in the first generation. For example, a Lavender Ameraucana rooster over a Speckled Sussex hen should give you solid black chicks where the pullets lay green eggs. But when you cross the offspring of mixes, the second generation can give you all kinds of surprises.
Welcome to the adventure. Chicken TV can be better than anything on cable, satellite, or antenna. So observe them, enjoy them, and draw your own conclusions on what works best for you.
