Incompetent

Heroes who are more likely to accidentally foil their own plots than the ones of villains they're fighting against, due to stupidity, bumbling, poor planning, cowardly behavior, weak strength or willpower, arrogance and/or unwillingness on their part.

For obvious reasons, these heroes are likely not successful, but in certain cases, they can still succeed in their goals, albeit they have the help of much more competent heroes, just with sheer luck, or simply after taking much unnecessary and difficult detours in their path to their goals.

Pure Good heroes will NEVER fall under Incompetent as they are capable of performing wondrous heroic acts and causing galvanization to others in a story which actually makes them competent and very beneficial.

Even if, in very rare cases, some Pure Good heroes are somewhat incompetent (e.g. Luigi, Po, Hubie, Leni Loud, and Papyrus) they're still capable of doing serious heroic acts and thus, they must go under the Dimwits, Cowards, Weaklings, and/or Misguided categories instead.