Totally depends on the theme you're trying to set. But I'm sure you already knew that. What you're really asking is: how do I find a song that fits exactly what I want?
I used to play around with setting music to animated movies (don't ask me why...I think I was just really obsessed with Dark Side of the Rainbow). What always struck me was how hard it actually was to set an entire song to one particular video. Consider what trailers for shows or movies do. In fact, consider my favorite example from the show boardwalk empire:
LISTEN TO THAT RIFF!! Oh man that kicks in around 50 seconds. What a great song right?!?! Well when I went to look into it and I found this:
I'll let you be the judge of the quality, but the emotional impact that song has doesn't quite compare to just the riff of that song in the trailer.
See what people who need to make trailers do isn't try to find a song that exactly fits, they choose a song and MAKE it fit.
I'm sorry I don't have an exact suggestion but in my opinion the best route is to make your animation, think about what type of song you want, and then edit that song so that it fits your parameters.
-GLAD