If you're looking for anime similar to Strike Witches TV, you might like these titles. All recommendations are made by Anime-Planet users like you!
Both anime have girls fighting against seemingly alien threats that threaten their homeworld, friends and family. Both series provide a high amount of fanservice while still keeping their battle sections lively. Symphogear has however got animation problems but makes up for it with having a very good soundtrack to say the least as it's very musically themed. Strike Witches is less amazing in the musical department but has more conistent animation and a larger cast which receives attention during it's 2 seasons.
The themes of these shows really aren't similar at all, however both of these shows are cases where a neat concept/story doesn't reach its full potential because it's drowning in its own fanservice.
However if you can look past that fan-service , both shows end up actually being fairly entertaining as they progress and you may start getting pulled into the story. Or better yet if you dig fan-servicey shows you'll also be in for a somewhat decent plot/action as a bonus!
I Liked Strike Witches better personally as it focused on its action a bit more.
So if you liked one of these cause it was fanservice with a little something more or you can look past fan-service for solid action, the other may be worth giving a try.