Epcot
My DD's favorite parks, in order, have always been MK, Epcot, AK, DHS.
If your daughter was really into animals then I'd say AK. Without the animals there isn't as much to do except for shows, and my DD never had much patience for shows. She likes Festival of the Lion King now, but wouldn't sit through it at age 4. She has always enjoyed the Boneyard playground. When she was little she liked taking the train to the section where you can brush goats. There's also the Triceratops Spin ride, basically Dumbo with dinosaurs.
At Epcot my DD always liked Ellen's Energy, but I don't know why. I'd think most little kids wouldn't enjoy it lol. She likes to go through Innoventions and participate in a few of the activities -- Piggy Bank Adventure and the Fire Safety ones in particular. There's the Figment ride, Maelstrom, and Grand Fiesta, the Nemo ride, Seas aquarium and activities, and Turtle Talk with Crush. Also, princess meet and greets all around the World Showcase.