This List is based on my personal opinion. I usually judge an actor / actress based on their acting ability I personally think popularity should have nothing to do with my judgment. I usually put the most versatile actors / actresses on the top because they usually have the most impressive performances.
1. Janine Chang
Born: 4 September 1982
Birthplace: Munich, Germany
Education: National Central University , National Taipei University
Degree in Law and Masters degree in Industrial Economics
Year active: 2003 - present
Outstanding versatile actress. Amazing performances in The Four and Hear to Heart.
2. Ady An
Born: 29 September 1980
Birthplace: Taipei, Taiwan
Education: Taiwan Hospitality and Tourism College
Spouse: Levo Chen (Businessman from Macau)
Years active: 2001-present
Loved her in Autumn Concerto and Demon Girl. Versatile actress.
3. Joe Chen
Born: 4 April 1979
Birthplace: Hsinchu County , Taiwan
Year active: 2001- present
Interesting performances in Fated to Love You and Cruel Romance.
4. Eugenie Liu
Born: 12 November 1990
Birthplace: Taiwan, Taiwan