Here's a list of some of my favorite Korean actors who are undergoing or have undergone military service:
Kim Rae Won. I liked his performance in A Love Story in Harvard and Gourmet.
Gong Yoo from the 1st Shop of Coffee Prince. I wanted to visit the cafe in Hongdae but I heard it's already closed :(
Jon In Sung from Memories of Bali. I heard he went out with Go Hyun Jung of Daemul and Queen Seondeok.
Hyun Bin!!! Mr. Dimples! :) I love Hyun Bin especially in Secret Garden and Kim Sam Soon.
Eric Mun, Mr. Funny Guy from Super Rookie. Eric is among my most favorite Korean actors.