OCS: Bella, Summer, Chole, Kristen, Girlie, Daisy, Destiny, Lunar, Kai, Chelsea, and Skylar. 

Kingdom Hearts: Kairi, Aqua, Namine, Xion, and Larxene.  

RWBY: Ruby, Weiss, Blake, Yang, Nora, Pyrrha, Cinder, Emerald, Neopolitan, Coco, Velvet, Glynda, Penny, Winter, Ilila, Summer, Raven, Willow, Kali, Sienna, and Salem. 

Godzilla/Kaiju No 8: Azura, Mina, Kikoru, Rin, Tae, Akari, and Hauka. 

Amphibia: Anne Boonchuy, Marcy Wu, and Sasha Waybright.

Final Fantasy: Tifa, Aerith, Yuffie, and Jessie. 

That's part 1 done for the harem. If you guys have some ideas of more harem members, let me know at the comments below, peace out and enjoy!