I decided to make a list of puns relating to every role. Most of them are going to be cringeworthy, but who really cares? Anyways, I'll try to start it off, although there won't be that much. If you have something just post it in the comments and I'll add it to the list.

Alien: I’m reading a book about anti-gravity. I just can’t put it down.

Bleeder: They told me I had type-A blood, but it was a Type-O.

Baker: I got a job at a bakery because I kneaded dough. Bakers trade bread recipes on a knead-to-know basis.

Clockmaker: When a clock is hungry it goes back four seconds.

Dreamer: When you dream in color, it’s a pigment of your imagination.

Autocrat: In democracy your vote counts. In feudalism, your count votes.

Keymaker: He often broke into song because he couldn’t find the key.

Tailor: Velcro, what a rip off!

Yeah, these are all pretty corny, but whatever. Just make sure you post better ones in the comments so I can add them to this.