I don't understand the question.
First, in every design there is some amount of coupling involved. Without coupling objects wouldn't be able to collaborate, so no work could be done.
Second, there is a myriad of design patterns out there. So the question probably doesn't have a single answer, if it has one.
Why do you care, anyway?
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus