FMAB as top anime and on top TV series list? *shoots fireworks*
My faith in IMBD has been restored (sorta).

Although,
Airbender and
Korra aren't "anime" so much as "anime-inspired". That's a common misconception. I'm not going to comment on whether or not they deserve they're high ratings, since I rather like them (though, I don't think Airbender is better than DN

).
Anyways,
FMA:B is without a doubt a masterpiece and its placement is well-deserved. The very fact that IMBD actually placed it so high goes to show that it appeals to more than just anime fans.
EDIT: I just looked at the list and saw that
The Legend of Korra is placed #6 on the list. Oh, come on! It's a good show (definitely an improvement over
Airbender), but I wouldn't say it's better than FMAB. I'm guessing this has something to do with the fact it has more publicity. Oh well. As I said, Korra's technically not anime, so FMAB is still the highest ranked anime.