Greatest Actors/Actresses in history and today? Top 10?

1. Johnny Depp

2. Tom Hanks

3. Matt Damon

4. Samuel L. Jackson

5. Natalie Portman

6. Kristen Bell

7. Kevin Spacey (this is based on skill and career-building up until the end, not morality)

8. Leonardo DiCaprio

9. Meryl Streep

10. Nicole Kidman

What makes a good actor I wonder?

I would think myself, the ability to play many roles well.

Though I'm pretty fond of some actors, even if typecast,

They play certain characters 'very well.

Then there's the thought of having good roles/surroundings,

By which one conflates what's 'around an actor, with the actor themself.