You may like Neopera. Mix of male, female and screamer vocals, but very very different from Amaranthe, kind of reminds me of Therion.
Lyriel's new "Skin and Bones" album might qualify too, if only just barely. The cellist and violinist they have in the band does give them a slightly symphonic edge, although it mostly makes it sound Elvenking folk-y. Still, I think it's their strongest album yet and have been loving it. Also note: they have a female singer, although she is pretty damn phenomenal.
Generally it's been a slow year for good symphonic metal. Damnation Angels' new one is still delayed for who knows how much longer, and the only other one I can think of is the new Xerath, which is symphonic death and probably not what you were looking for.