Peter's return: when the command is fearful

Three incompetent managers are described: a fearful ignoramus, a persistent and persevering procrastinator and an affected dilettante installed in idleness and idleness, i.e., Peter, Harry and Charlie. All three are imaginary characters and any resemblance to reality is purely coincidental. However, if the reader knows any incompetent commander, it is to be expected that he or she will resemble to a greater or lesser extent any of these characters or combine characteristics of them. The descriptions of this trio of inept people are completed by applying to them the Fundamental Laws of human stupidity, the Peter Principle, Parkinson's Law and other considerations. Peter, Harry and Charlie, what elements.