Well my only real exposure to harem MCs are these two, lol. I liked QQ a lot, it’s a little slow at first but it’s very charming. Fuu-kun in QQ is a good guy, he’s not a saint like Rentaro but the show also isn’t batshit insane like 100 Girlfriends, so he’s more of a real person. You always like him though, at least I did, and you believe he cares about all of them. At the very least it’s a fun light watch.