Have you watched the sequel seasons to
Full Metal Panic?
I guess there is also
Chrome Shelled Regios.
Ranma 1/2 is more of the comedic side of a romantic action farce. (I like to think of it as an endless recursion of "Much Ado About Nothing" combined with repeated loops of "Taming of the Shrew")
I don't know if you've seen
Fullmetal Alchemist, but
FMA: Brotherhood is likely to have more romance side plot. Still mainly action though.