 If you liked
Fate/stay night
|
 ...then you might like
Princess Lover!
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Two of the characters look alike:
Saber (Fate Stay Night)/ Sylvia van Hossen (Princess Lover)
and
Rin Tohsaka (Fate Stay Night) / Seika Houjouin (Princess Lover)
FTS is more action and less harem but it used to be a eroge whereas PL is more harem both have good action scenes as well.