How are Antigone, Gertrude and Ophelia similar?

In the plays Antigone and
Hamlet, Antigone, Gertrude, and Ophelia are all tragic victims,
though only Antigone, I would say, is a tragic
hero.

Antigone is a tragic
hero because she incites the action of the play, makes a tragic mistake,
and suffers dearly for it.  Her rebellion against Creon's unjust civil law causes her to
suffer and die.  And, let's face it, she makes the tragic mistake of being stubborn even
after she proves her point.  She goes to her death full of tragic
hubris (pride), a romantic zealot with a death
wish.

Gertrude and Ophelia get caught in the cross-fire
between the tragic heroes Hamlet and Claudius, but their roles are not enough to be
classified as tragic heroines along side Antigone.  Instead, I would classify them as
supplients who provide vision
of unmitigated suffering and helplessness.  This is an archetypal term used by critic
Northrop Frye, who kind of wrote the book on classifying
characters.

Other
similarities:

• All three die, obviously, but
  their deaths can all be blamed on the state (unjust laws,
  kings).


• All three are blind: Antigone to her pride;
  Gertrude to her son and husband and Ophelia to her father.
  

Differences:

• Antigone
  and Ophelia suicide, but Gertrude's death is murder
  


• Antigone and Ophelia are victims of incest, but not
  Gertrude (who commits it herself).  Antigone's family is cursed by incest: she is the
  daughter/sister of her brother/father Oedipus.  Ophelia is caught up in Hamlet's revenge
  against incest and adultery, not to mention her brother's and father's incestuous-like
  jealousy of her and Hamlet.