Voldemort: Taurus

Lucius Malfoy: Capricorn

Sirius Black: Pisces

Arthur Weasley: Sagittarius  

Bill Weasley: Leo   

James Potter: Aquarius

Marvolo Gaunt: Virgo

Igor Karkaroff: Libra

Frank Longbottom: Scorpio

Ollivander: Cancer

Peter Pettigrew:Gemini

Vernon Dursley: Aries

Igor Karkaroff. Just who I wanted to be. The guy that is a coward and eventually dies. Fun, fun.