Are you trying to build your culture to become a place everybody wants to work? Part of that task includes identifying toxic personalities that discourage new talent or cause great employees to want to leave, and then fixing those problems. Sometimes fixing could mean terminating a person, but hopefully you can keep them around and fix any issues with some training.
This infographic from Workfront (formerly AtTask) identifies 9 people who may be lingering in your office and destroying your efforts to create that ideal culture. Do you recognize any of them? If so, do they concern you?