Since Disney's Little Mermaid "reboot" of its animation department in 1989 here's how the princess-to-non-princess fare stacks up with original theatrical domestic US totals for the most part. * = princess movie.
The Lion King $312M Domestic
*Aladdin $217M Domestic
Tarzan $171M Domestic
*Beauty & the Beast $145M Domestic
Lilo & Stitch $145M Domestic
*Pocahontas $141M Domestic
*Mulan $120M Domestic
The Hunchback of Notre Dame $100M Domestic
Hercules $99M Domestic
The Emperor's New Groove $89M Domestic
Brother Bear $85M Domestic
*The Little Mermaid $84M Domestic
Atlantis $84M Domestic
Fantasia 2000 $60M Domestic
Home on the Range $50M Domestic
Treasure Planet $38M Domestic
The Rescuers Down Under $28M Domestic
So, it's not all princess films with Disney. The Lion King eats them all by nearly $100M domestic gross. Princess projects are usually the fare of the straight to video cheapquels. Well, they sell. The lineup of classic to modern princesses include: Snow White, Cinderella, Sleeping Beauty, Ariel, Belle, Jasmine, Pocahontas, Mulan (more or less) and Tiana with Rapunzel to come next year.