I'd be interested, as I am a massive SCP fan and have written an article for it at one point. Just gonna ask/clarify a few things 

-An entity being being Keter class doesn't denote danger, it shows high difficultly to contain. Like, a harmless guy that could teleport anywhere would be Keter still
-Please don't just stick to Series 1, Series 2 and 3 have some amazing and creepy SCPs
-The Foundation keeps objects as well as creatures
-Lots of SCPs do a mental effect, so that could be tied in nicely 

I'm really well read on Foundation knowledge, so I'd be glad to provide more obscure and interesting SCPs for the RP if needs be