So, I've had this idea for a fan fiction in my head for a while now, but I've hit a bit of a roadblock on characters. I was wondering if anyone's willing to help

Basically, it's a variation of TF2's 'Meet the Team' videos, but with characters and creatures from horror games as the classes. So far, I've decided on these classes:

Heavy-Chris Walker (Outlast) [Both are huge, powerful, and don't seem to talk very much]
Medic-Chica (FNaF) [I have a pretty good idea on how exactly her chapter's going to go, and I have a design for her Medigun visualized]
Sniper-Freddy Fazbear? (FNaF) [Freddy spends most of his time watching from behind the front lines, but I'm not averse to other ideas]
Spy-Either the Puppet (FNaF) or Slenderman (Slender) [Slenderman's completely featureless face could shift to look like those of his victims, and the Puppet's attack strategy, for lack of a better term, is remarkably similar to Spy's]
Demoman-Foxy (FNaF) [They both have eyepatches, and I already have some dialogue written for this particular one. Plus, the idea of Foxy launching himself into the air with Sticky Bombs is too hilarious to pass up]

The dialogue is going to be changed quite a bit from the videos that the fanfic is based on, but it will stay somewhat similar, but as I've said, I have no idea on who some of the classes will be. Does anyone here have any ideas?