Which ones? I’m definitely missing plenty of them, but for many different reasons. Some are characters only mentioned or heard speaking but never seen on screen. Some are on screen only, but don’t speak and are unnamed. Others I could have simply missed.
You can help by posting in the forums, commenting on a relevant post, or mentioning @taddy in a message. I also have a dedicated Help Taddy page where I solicit help for unanswered questions about certain characters.