5. Kevin Stoley- Kevin has had his moments, but really needs more lines and screentime, there are so many things about him, such as him and Red or his sci fi addiction.
4. Lizzy- Lizzy hasn't had a major role in decades. I could see a lot being done with her rather than being some bully. Maybe she's immortal like kenny (getting eaten by a bear) or maybe just part of the girl group, like Heidi or Annie.
3. Francis- Francis REALLY needs some more time. Every character so far has had at least some spotlight. Francis can become a side character, or something to make him stick out. He likes Snack Smores, so make something off that.
2. Brimmy- Brimmy is very iconic. He is known for being the first background character in south park, yet has only had one line in a video game. Brimmy is well known by many fans of SP and even has fanart! (No joke, type "South Park Brimmy" on google and look on images.)
DogPoo- DogPoo needs a spotlight. He looks like a major character, but is just a minor character who barely speaks. DogPoo is becoming more major as time goes on, but he NEEDS some spotlight. He needs to be there with Stan, Kyle, Catman, Kenny, Token, Jimmy, Clyde, Craig and more on the lunch table. DogPoo has huge potential, and could be just as memorable as his Peanuts counterpart. Good luck getting the spotlight DogPoo!