I hope we are able to each agree this sentence is Improper due to the fact "great" is an adjective, and can't be the subject of "is". The exact same is true whenever you put "the best" in that place. It is easy to argue that "the best" could be https://fernandoredgj.goabroadblog.com/37094178/the-ultimate-guide-to-cyber-crime-lawyer-in-dha-karachi-pakistan 
