Ok, Listen up. Right now, The harem is going to limited at the moment, his starting harem would be a harem of Villains around his age.

1. Tomuka Shigaraki

2. Dabi

3. Himiko Toga

4. Cinder Fall

5. Emerald Sustrai

6. Neopolitan

If you want to put in girls from UA, that's fine. but note that it would take a while for him to open up to them.