Best (male) - I'm pretty biased but I actually like Ryoma's wild mane. I guess it'd be Ryoma, Niles, Laslow, and Kaze.
Best (female) - Sakura, Oboro, Selena, Nina
Worst (male) - Hans, Ignatius
Worst (female) - Camilla, Peri
For those who don't want to watch:
Brides are Caeda, Charlotte, Cordelia, and Lyn
Caeda is a mage (blue), Charlotte a lance user, Lyn is a staff, Cordelia is a bow