A rooster is unlikely to help you with a raccoon. While raccoons can be around during the day, the chickens can usually avoid them. It’s nighttime when the danger is highest, the chickens are asleep on the roosts and can’t avoid a raccoon.
Your best protection against a raccoon are good barriers, not a rooster.
In what way is that rooster rude? In some cases what we determine to be bad behavior is just typical chicken behavior. I don’t know your experience level and I certainly don’t want to insult you, but I remember one lady that got a shotgun and blew away a rooster for raping hen hens. Neither the rooster nor the hens were doing anything that was not normal and natural for chickens.
How old are the chickens in question? There can be a lot of differences in the behavior of cockerels and pullets versus mature roosters and hens. Also a dominant rooster will act differently than a subordinate rooster. That Silkies behavior could change if he becomes top rooster.
But the bottom line, don’t worry about one rooster being much help with raccoons. Neither one can win that fight. Keep the one that you are happiest with.