A bittersweet last Doctor would be the only American who could pull off the role--
He already played a Time Lord as Willy Wonka--right down to his Wonkavator Tardis
I love Johnny Depp, but Wilder would be my choice.
In the last scene, I see the light atop the Tardis light up, and it and the roof only disappears.
The four walls of the Tardis fall away like petals. It was always just an empty box. They fade from view as they fall.
Lastly, just the square pedestal of the Tardis reamins.
On it is a single word: