Best actress? Wow, kind of hard to say because they all act well in different kinds of lakorn.
I would say Kob S. for the sad, innocent type n'ek.
Then, Joy S. for the singing type n'ek. Never forgot her in Jaen Jira either.
I also like Tik K. in Galikhet. She made me cry in that lakorn.
Modern day: Kwan is pretty good, in the roles that she chooses to play. Then, I'd also say Ann T. is talented.