I don't know, Charred Knight. Ranma has a large nest of love with Akane, Shampoo, Ukyo and Kodachi. Meanwhile, Tenchi has Ryoko and Ayeka (the only two who are in love with him) and then everyone else. When it comes to women actually loving the protagonist in a romantic way, Ranma has the larger harem. Hell, it's still 1:6 of male to female in both series if you take into consideration all the women, but only 1/3 of the women love Tenchi and 2/3 of the women love Ranma.
:arrow: Tenchi- Ayeka, Ryoko, Wasshu, Mihoshi, Kiyone and Sasami
:arrow: Ranma- Akane, Shampoo, Ukyo, Kodachi, Nabiki and Kasumi
I also really want to disagree with Akane being based off Lum, but I don't know if I'm qualified to since I've only seen the first 10 episodes of Urusei Yatsura. In those 10 episodes, though, I saw Lum as a hardcore psycho. Akane is just kind of brutish from her martial arts training, but still softens up a good deal as the show progresses and was much more passive aggressive with the occasional punch.