While I pretty much agree with most of what's been added to this thread, the list has more to do with being a MOVIE STAR than it does being an actor...
From the site:
"In this feature, you’ll see 50 embodiments of that most indefinable term, star quality. You will see male sex symbols who are undeniably Adonis-like, and others who are not nearly as refined in the physical-feature department but could still make their targets melt. You’ll see a squeaky-clean singer with a sultry side and a toddler with all the confidence of ten seasoned vaudevillians. The thing about star quality is that it’s mercurial. As the saying goes, you know it when you see it."
They're plainly talking stardom and movie stars rather than the 50 best actors of our time...
filmy