Veronika Zeminova is amazing.
I'm also a big fan of Alisha Klass.
My choice would be....Georgina Spelvin. (Devil In Miss Jones)
As a side note, I'm sure that this must be common knowledge, but check this out anyway...
A tradition in the theatre assigns the name "George Spelvin" to any actor who doesn't want his real name known or who is playing a part so small that credit would be an embarrassment.
Who is really running this board?