Unlike the Wannabe, the Guru does actually exhibit real competence and may even be considered an expert in their field. The main problems stem from their inablility to deal with others emotionally. They compensate for their emotional immaturity with their intellect. Many of them are very intelligent but emotionally distant.
They may feel that they are superior to others and don’t consider how their decisions will affect other people. They are know-it-alls who don’t recognize the possibilty that they are wrong. Related to this is that they don’t accept responsibility for the consequences of their actions.
Their cold, analytical approach extends into their environment and they may be unusually neat and orderly. They will generally hold to conservative views but not feel constrained by laws, mores or regulations (those are for others, not them).
This workplace bully lives in their own emotionally barren world where they view themselves as intellectually superior. That is why they are genuinely shocked if ever accused of workplace bullying.