So, my DM just introduced a new class called swarmhost. Basically your character serves as a living hive for a bunch of tiny creatures. It sounds pretty awesome and i'm thinking about creating one, but i'm not sure what creature to choose. I don't know, but most creatures like insect, rats, snakes and/or spiders feel so generic. Will o wisp or grey ooze are a bit more creative, but i'm looking for something with a bit more pep. Do you guys know anything i could use? It can be pretty much anything with a small enough build to fit in your body. 
Thx in advance for taking your time reading this. i appreciate it very much.

Looking at the list of tiny creatures, the one that stands out to me is Abyssal Chicken

I would also accept miniature giant space hamster