As someone else mentioned, a parrot and musket as a long range dps.
A Giant cannon - burst/high damage or tank spec, you have to set it up and are less mobile, you can jump off the cannon to avoid yourself from taking damage, but the cannon also has a HP bar if you jump off it, and must be setup again if it dies, this would be a burst/high damaging spec, but the lack of mobility would balance it, would also fit in well with a tank build since they are typically low mobility anyway.
Blunderbuss and hook (would love to see this, never seen it before, I guess it could be argued its a fist weapon)/sword/axe/dagger close to mid range dps/tank spec.