I second A Gentleman's Dignity, as well as Playful Kiss (only as @kdramasinpajamas says, it's more that he has player qualities -- women find him very attractive -- but he's not exactly a player since he doesn't actually flirt with tons of girls ;) )
(the ones with a + mean that it's really a strong aspect of the story)
Autumn's Concerto +
MARS (a "bad boy" a lot of girls have a crush on)
ToGetHer (kinda, since he's a celebrity and enjoys his popularity with girls)
Que Sera Sera (he's worse than a player, dating rich women is how he earns a living haha) +++
Last Cinderella (not nearly as bad as the previous character, but a bit similar) +
Devil Beside You +
Full House (I have never finished any version of it, but have watched bits of the korean and the thai version especially, and in the lakorn I think he really was a womanizer)
City Hunter (a little bit, although not central)
Yamato Nadeshiko Shichi Henge (sort of: women adore him, but it's against his will...)
