No, COD 4 was a truly groundbreaking game, and the series hasn't gone anywhere but down since. The Battlefield series on the other hand....hasn't gone anywhere but up.
It's the best selling series of all time money-wise, but it isn't the best. For me the top five are Infamous, Portal, Mario, Zelda, COD in that order. As for all of you saying Halo... it isn't even in my top million... to glitchy...