The only guest I can ask for is the YouTube Let's Player NicoB (NicoB7700)! He is most well known for his 40ish various voices that he plays on his channel and for getting people into various gaming franchises, most notably Danganronpa. Other games include Ace Attorney, Persona 4 and 5, and Kingdom Hearts. His fan base, the Picky Penguins, is arguably one of the most dedicated and caring of them all since Nico tries to be as personal as he possibly can by directly addressing people's comments from previous uploads! He has just begun selling official picky penguins as merchandise! Additionally, his videos have led to popular memes in a substantial number of video games series, particularly the "hope bagels" of Komaeda from Danganronpa 2 (despite bagels not appearing in the game at all!).
Since the theme of Fanime this upcoming year is gaming, I think he would make an excellent guest, especially since Danganronpa V3, Kingdom Hearts 3, and Persona 5 will be big topics next year! Above all, NicoB has admitted to never attending an anime convention before in his life. It would be absolutely amazing for him to come, and I'm sure no one will ever regret it!