There are a few male harem (or reverse harem) I recommend that are good to watch and have enjoyed watching these too;

1. Saiunkoku Monogatari
2. Hanasakeru Seishounen
3. La Corda d'Oro
4. Yamato Nadeshiko Shichihenge
5. Ouran High School Host Club
6. Neo Angelique Abyss
7. Koi Suru Tenshi Angelique
8. Harukanaru toki no Nakade
9. Vampire Knight
10. Fruits Basket