I don't have much in terms of other characters to bring, but for the muses I have, I could go with Doctor Doom (bowbeforedoom) from Marvel Comics or Jinbei (sunny_pirate) from One Piece. Admittedly, I really need to look into more comics for Doom (I had a hard enough time finding all of his Fantastic Four appearances - I have no idea how I'll find out when he appeared in Spider-Man, X-Men, the Avengers, the individual members of the Avengers, that time Luke Cage beat the crap out of him for not paying $200, etc.), but I just find the character fun to throw at people.

I've got other characters (Solid Snake from Metal Gear, Dr. King Schultz from Django Unchained, the Blacker Baron from Anarchy Reigns), but I don't know if I'll have them appear - depends on the individual posts, I guess. Also, I might bring back Blackbeard from One Piece, just for the lolz.