If your looking towards somthing anime-like, the Cherry Blossum Festival a.k.a. Sakura Festival, has a great selection of anime stuff. Though I wouldn't recomend cosplaying, you can dress in a samuri robe, but that's kinda the limit of it from what I know. I've only been there once though.
The Rennicance Festival, the is the best!!! Ded Bob is funny, the pirate pub is cool, I could go on with it. I go every year as a pirate, and I don't get laughed for it, which makes me happy too.
As for the others, I have no clue about.