Great film, but a 9.0? Seriously?

Rating: 8/10 (25 August 2013)

I'm giving this film an eight because I think that is what it deserves. It has a great performance by Heath Ledger, and it is the type of film which keeps your eyes glued to the screen from start to end. But, here are my problems.
If you take out Heath Ledger's performance, the film wouldn't have been as memorable, as it would lack a strong antagonist. Should this film be glorified as 'One of the greatest films ever made' just based on one persons performance?
This film has already taken over 12 angry men, fight club, Schindler's list, star wars, Goodfellas and one flew over the cuckoos nest on the IMDb top 250. But in my opinion, the Dark Knight doesn't come close to these films.
This film is great but definitely doesn't deserve to be put 6th on IMDb top 250. Also I've noticed Inception is 14th greatest film, that definitely doesn't deserve that bloody rating. My review/rant is over , Thank you