Audrey Hepburn from UK
Madhubala from India
Sophia Loren from Italia
Turkan Soray from Turkey
Most Helpful Guy
That picture you have of Sophia Loren is when she is much older than any pf the others. Here's one that gives a more fair comparison.
She'd be my choice of those provided.
Most Helpful Girl
Audrey Hepburn was technically born in Brussels to a British and Dutch citizen. She had no mother tongue and spoke multiple languages. That's why she had such an interesting accent.