You forgot the biggest money maker Uncle Walt had after wooing the rights to another person's character: Mary Poppins.
That story is so interesting that there's a major movie coming out about it, "Saving Mr. Banks", about the multi-year work Walt Disney had to do to get the rights to P.L. Travers literary works on Mary Poppins. Ms. Travers was the J.K. Rowling of her day; passionate about her books, a tad eccentric, and untrusting of Disney as a company. But Walt finally won her over, got the rights to Mary Poppins, and the rest is history.