I also adore this trope and wish that there were more of them.
-Flower of Evil is an excellent recent example. A married couple of about 14+ years with a kid.
-Hyena (They date at first - sort of - and then re fall in love throughout the series).
- Mystic Pop Up Bad (It's not evident at first, but becomes sweetly clear later).
-It Started with A Kiss Part 2 (They are already married, however, it's hard to appreciate this as much if you haven't seen the first part).
I wish there were more married couples...