Prince Phillip set the Standard
Anyone else feel Phillip set the standard for heroes in Disney films. Before him, the Princes were pretty much bland and characterless. All they did was show up at the end and get the girl. Even Cinderella's prince had the Duke do the actual work of finding the girl he loved.
Phillip had a personality. He was goofy and lovable. But he fought a dragon--A Dragon!--for his princess.
After him, we get Eric, Aladdin, The Beast, and others who fight for the people they love and take a proactive approach.
But Phillip started it all.
Straightedge means I'm better than you.