I have another one: Andrew W. K.
Hear me out:
* AWK has already put out an album of Gundam music https://en.wikipedia.org/wiki/Gundam_Rock
* As well one covering a lot of Japanese pop songs in English https://en.wikipedia.org/wiki/The_Japan_Covers
So there are his bona fides for being "within scope" of the Otakon Mission of promoting Asian pop culture.
* AWK already appeared at an MLP convention, so he has been to the proverbial rodeo before
* AWK has a prior relationship with Elliot in the Morning of the DC-101 morning show, meaning he could promote Otakon
* Like L'Arc en Ciel or Yoshiki, there are fans willing to get a membership just to attend the concert.
* I'd go to a panel where he explains how he came to like anime