You are liable to hear about anything on this topic. That's because there are no rules. Any ratio can work well or any ratio can have problems. Each chicken (boy and girl) has its own personality, the more room you have the better, and how you manage them can have an effect.I have heard different no less than 5 hens for a rooster and no more than 10-12 to one rooster.
Why do you want a rooster? The only reason you need a rooster is for fertile eggs. Anything else is personal preference. Nothing wrong with personal preferences, I have a few myself. I typically suggest you keep as few roosters as you can and still meet your goals. That's not because you are guaranteed to have problems with more roosters, just that problems are more likely the more boys you have.
Your decision should be based on your goals and desires, not mine or any other stranger's. If two boys is what you want that is a great decision.