Without further ado, and in alphabetical order:
Looks like a cousin of the Padillas.
(Bright Girl, Fated to Love You)
Kim Jae Wook
(Coffee Prince, Mary Stayed Out All Night)
Kim Nam Gil
(The Great Queen Seondeok)
Lee Jun Ki
(My Girl, Il Ji-Mae)
(Sungkyunkwan Scandal, Rooftop Prince)
So far the most photogenic of this group. Him and Jang Hyuk are my brother's only choices.
(Autumn Fairy Tale)
Yu Seung Ho
(The Great Queen Seondeok, Arang and the Magistrate)
This kid, seriously! Plus points for the cat!
Bae Yong Jun, Choi Jin Hyuk, Jae Hee, Jang Geun Suk, Kim Jeong Hoon, Jang Seo Won, Yun Sang Hyeon, Jung Yong Hwa, Lee Min Ho
We've also thought about adding Lee Dong-Wook, Rain, Kim Woo Bin and Hyun Bin, but from what photos and dramas we've seen, they're a little inconsistent.
So there you go. Next will be the actresses.