And then there's pikminlink.
Without a doubt the best cosplayer I've ever seen, pikminlink brings Link from The Legend of Zelda to life. Thanks to the intricate detail of the costume (which must have cost a small fortune to make), you can really believe that everyone's favorite elf-boy has stepped out of Hyrule and into reality. It's not just a costume, it's art.
And guess what? She's a girl.
Check out her deviantART gallery for her in several variations on Link's costume and as several other characters, plus some original art.