6 years later now and hope you still look at this i recomend you watch EVERY one of these, all good plot great animation with lots of etchi
, all are also animes, but all anime's that i know of start out as manga so.... yeah.
A few that have not been named were Highschool DxD, very good 10/10 tons of breasts and all girls are super hot.
Future diary, 8/10 guy has this psycho girlfriend that wants to kill everyone so he can become a god and there phones can tell the future
Seikon no qwaser 10/10, debatable on hentai because in order for the main character to fight, he needs to suck on a girls breast to get soma(basically energy) but is very good with harem and etchi and lots of action/good plot
Another good one is demon king daimo 9/10, great anime with fighting and some magic
Ikki touson 10/10, many different series, and doesnt have harem but is all girls fighting, half the time their clothes get ripped up.
Another one is Martial hearts, very good but also very short. The name might not be exact but is somthing like that.