Greetings.
I have a very traditional, slightly evil Pure Blood family with three sons that need a betrothal.

This marriage does not need to be happy or unhappy. The spouse does not need to be light or dark, kind or wicked. For the eldest son a widower or divorcee is fine. He is 29 years old and very antisocial.
The second son is rather scarred and weak in magic. He is 20 years old and has never been in a relationship.
The third son is age 7. He is rather hateful of non Pure Bloods. An arranged marriage with him may later be dissolved.