- helpless
- depressed
- jerks
In my subjective experience:The top one has about %50 shot of being a character flaw, eg, no amount of confidence-building will help.
The middle one has the most hope, if the talent potential is significant. The best in the field can be painfully shy as well as depressed. The problem is that depression (not shyness) hurts morale. [1]
The last has a %75 chance of being a lost cause. Impossible to manage as they are incredibly disruptive to morale and productivity. [2] Their survival is often linked to mastery of politics, which inculcates their position.
[1] http://m.fastcoexist.com/1679208/a-sad-worker-is-a-bad-worke...
[2] The No *sshole Rule by Robert Sutton