I think 1 and 8 are good. The jokes are solid. However, using the gabe-kovacs character doesn't work, I think. His expression is too deadpan for your purposes.
As for the rest, I don't find many of the jokes funny. They tend to be based on weak premises, and depend on an excessively literal and naive view of heirarchical office relationships, which I think has some potential, but isn't carried off very well here. Maybe it's that the people who have this view seem fairly normal and sensible otherwise. The reader assumes that it's the author whose perceptions are skewed rather than his characters. I guess I'm saying you need to make your characters either more or less outlandish.
Good luck, and welcome to Stripcreator.
---
The what mentioned above is total fiction. Please don't take it seriously!