Just finished watching Highschool DxD

Will watch it eventually lol. I know very little about DxD's premise, but I'm assuming when you say "like these" guess you're talking ecchi's. Umm off the top of my head, HighSchool of the Dead, To Love-Ru, Rosario+Vampire.

Check out this list of recommended Anime's
http://i.imgur.com/27VUHaq.jpg

It was decent, it hit all criteria for a harem anime (comedy, plot, nudity, action, boing, many more)

They combined it very well, I'm looking forward for its season 2

for the suggested animes here:

No comedy but has action and so much boings: Queen's blade
Comedy, aliens and unexpected girlfriend appearance: To Love ru
Incest, comedy, school life: KissXSis
Action, comedy, boing sucking: Seiko no qwaser
Incest, with decent plot: Yosuga no sora

Season 2 of Highschool dxd comes out on may 2012 -_- damnit!

If you liked the Highschool DxD story, Baka-Tsuki has translations of the first 13 novels. The anime covers volume 1-2, and I think a couple of chapters from volume 8 (which was a collection of short stories).

school days heh

In case u dont know Season 2 is comming out soon this year! Just to cheer u on!

mirai nikki, another, rosario + vampire, vampire knight, and, if you wanna cry, watch clannad and clannad: after story