 If you liked
Kuroshitsuji
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 ...then you might like
Mayo Chiki!
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Both comedies about a relationship between master and butler, where butler is always trying to protect his master. While Mayo Chiki is more romantic, Kuroshitsuji has more action.
Konoe and Sebastian are certainly based on the same archetype, and despite being in a completely different genre, both series have a similar feel/sense of humor. Mayo Chiki is basically a gender-swapped Black Butler made in the ecchi-harem genre, and Black Butler is what you would expect Mayo-Chiki to be if it wasn't so focused on the ecchi. That said, Black Butler is much darker between the comedy.
Also, to conform with the apparent standard, both have a butler in a suit serving someone with weird eyes!