Hi and welcome to the Gigabyte forum.
It really depends on your budget and how much noise you are prepared to stand also of course how big your case is.
The top of the range has to be the Noctua NH-D14, huge but extremely powerfull and fairly quiet even at speed. There are several others in the Noctua range which perform almost as well.
The other one that I have always been impressed with and can be used with or without a fan is the Xigmatek Thors Hammer.
Below these are many others similar in performance.