Allow me to bring out da list.

Demon King Daimo

Senran Kagura (not much of a romance...)

Asu No Yoichi

Medaka Box

Sekirei

Shukufuku No Campanella

SA- no fuck that. just no. NO.

The World God Only Knows (?)

To Love Ru

Seikon No Qwaser (i love this anime to death but they done fucked up)

Rosario + Vampire

i have more if required, mostly harem here lel. IT'S ALL GUUD MANG.