Most Powerful Star Wars Character

There are many characters with many different skills and weapons in the Star Wars universe, and the six films barely scrape the ice of the arsenal of personalities there are, but who is the most powerful? This is a topic which has long been argued (usually by two people shouting "Vader!" "Sidious!" at each other), but it is now up to you to decide. Obviously, I cannot fit every single character on this list, but if you feel there is a glaring omission, I will be happy to add it! Note: Unless specified, consider each character at their peak, at the height of their powers