Depression in HP characters?

[Hagrid]

No: HPFGUIDX 182249

I just saw a news article about JKR being so depressed before starting 
to write HP that she was contemplating suicide.

http://au.lifestyle.yahoo.com/who/news/24032008/jk-rowling-admits-she-
was-suicidal.html 

Jo has brought other things into Potterworld as instructional to teens. 
Have we also seen those in serious depression and fighting to get out 
of it?

Not just Filch regretting punishments weren't like the good old days, 
nor Moaning Murtle who is not in the right state to accually overcome 
any depressed feelings ...

Ginny when she was loosing hours out her day during COS - you wouldn't 
say actually suicidal, but she put herself down alot.

What / who can you think of?

aussie