Noodler

Example:One of the biggest time-suckers at the office is the noodler who never produces any substantial work.

Definition:someone who takes up a large amount of time without accomplishing much; a time-sucking individual.

Example:He's a doodler and tends to waste his writing time on trivial subjects.

Definition:a person who engages in aimless or unproductive activities, especially drawing or writing.

Example:During the meeting, he joined the hangar-tenneler ranks by constantly rambling without really addressing the issues.

Definition:a person who keeps talking in meetings without contributing much to the discussion; a hangar-tenanting individual.