putterer

Example:He's just a droney sort of guy who never really gets involved.

Definition:A person who works at a low level with little skill or originality.

Example:The same routine over and over can be very humdrum after a while.

Definition:Boring or tedious; monotonous.

Example:He's such a pedant; he always catches people out on silly spelling errors.

Definition:A person who is excessively concerned with trivial or unimportant details, rules, etc.