User blog comment:Drakan95/Omi vs Percy Jackson. Epic Rap Battles: Cartoons vs History/@comment-5264252-20150902105345

For some female battles:

Harley Quinn vs Annie Wilkes (Obsessive girlfriends with hammers)

Maleficent vs Wicked Witch of the West (Green-skinned witches with flying pets that go after a young female, one being put to sleep and the other already having been asleep)

Cinderella vs Princess Diana or Marie Antoinette (Princesses basically, but Cinderella vs Diana works as two of the most known princesses and Cinderella vs Antoinette works as a sort of good vs bad princess thing)

Maka Albarn and Soul Eater vs Ammit (Soul eaters)

Eliza Thornberry vs Jane Goodall (Zoologist)

Betty Boop vs Marilyn Monroe (Icons of beauty)

Atomic Betty vs Ellen Ripley (Alien fighters)

Turanga Leela vs Princess Leia (Gun-totting space adventurers that don't know their real parents until they're older)