Scrooge McDuck

Scrooge McDuck was, according to the Ninth Doctor, a "peasant" compared to Drake Ayelbourne, the richest man in the universe. (COMIC: Mystery Date)

Behind the scenes

 * Scrooge McDuck is a fictional Disney character who first appeared in various comic books from 1947 before going on to appear in other media. He is the in-universe uncle of Donald Duck. The character is known for, among other things, his immense wealth.
 * David Tennant currently voices Scrooge in the 2017 revival of the animated series.