FL Doesn't end up with ML

Any drama were FL doesn't end up with any of the MLs but someone you never expected FL would.

 the main focus does not have to be romance, rather it'd be better if main focus isn't romance. 

And FL just remains friends with all the MLs and marries/ends a supporting or completely unimportant character

Glowing She - the very end is one of the best things about the Drama, imo.  Also, Juhan Shuttai and Seigi No Se both focus on the FL's career growth, basically zero romance except for hints of possible future attraction, not developed in the Dramas.