60 guppys in a ten gallon? Bloody hell how did they manage to fit them all in there??
Anyways, i had 2 pearl danios not long ago which i rehomed recently cos they were picking on my guppys non-stop and i would say they were pretty active fish; at the moment though i would say my black khuli loaches are probably my most active fish, they never seem to get bored of swimming around in circles on their on or around each other.