Charles was never a handsome man. Younger photos of him make me wince at his awkward & gormless face. I think he works his looks much better as an older gent.
The Princess Royal had a certain, regal prettiness back in the day. She looked incredible on her (1st) wedding day). Her daughter Zara shares some traits, and Zara is a very good looking woman.
I thought the late Queen had more character & charisma than beauty. However my DP disagrees and thinks she was sexy back in the day! "Have you seen her riding a horse side-saddle? Phwoaarr".