Ranma ½, Zero no Tsukaima: Futatsuki no Kishi Recommendations
Akane and Louise are both violent girls. Ranma and Saito are both popular with girls. The funny thing about Ranma 1/2 is that it's full of trouble. It's the same thing for ZnT. Plus, ZnT can be considered as a romantic comedy too, I think. The only difference is that ZnT is a tiny bit more serious than Ranma 1/2.