Obsessed

Heroes who obsess over something and have a fixation on something that exceeds besides power (because obsession with power counts as megalomania or Power Hungry) or money and fame (since that counts as fortune seekers), and they take extreme interest in what they are completely invested in, which goes to the point of obsession and irrationality.

Many obsessed heroes are also mentally ill, though some are merely eccentric or fanatical since they tend to lose control over themselves in regard to what they are highly interested or worried about to the point of insanity and hyperfixation.

Despite this, some of these types of heroes are Pure Good mainly if they don't cause any harm or despair through their obsessions and have no corruptible qualities whatsoever.