Headpool
Headpool is the zombie head of Deadpool. Not our Deadpool, but a different Deadpool from another dimension, where a virus changed the world's super heroes and villains into zombies, and everyone else into food. The zombie Deadpool (still with body intact) was sent to our dimension to spread the virus, but ran into trouble with an airboat fan, and was left a head.
The now just-a-head Zombie Deadpool, still able to talk without a throat, ended up having adventures with our dimension's Deadpool, before becoming a member of the Deadpool Corps, a group of Deadpools from other dimensions.