I hope we can easily each agree this sentence is Mistaken simply because "great" is really an adjective, and can't be the subject of "is". Precisely the same is legitimate after you place "the best" in that location. It is easy to argue that "the best" can be appropriate as https://kyleraojko.alltdesign.com/rumored-buzz-on-corporate-lawyer-in-karachi-56953003 
