This Generation's John Wayne?

I recently read the interview AMC did with Mark Johnson, and in it he said that there will never be another John Wayne.

That struck me curiously. I know that The Duke was singularly unique, but to say that no actors today have the potential to do what he did, or to be as great as he was seems a little too much of a stretch for me.

At times I think Russell Crowe has that potential, or perhaps Christian Bale (and I don't just mention those two because they were both in the 3:10 to Yuma remake).

What do you all think? Can there be another John Wayne? Which actor do you think comes closest?