In the Horde? Well, I guess there's just me and Entrapta, really. (well, Kyle was pretty nice, but I don't know if I'd call him "dangerous" really. Oh, and Lonnie and Rogelio were nice most of the time too).
But if you look outside of the Horde, well, that's pretty much the entire Rebellion. And take it from someone who fought against them a lot, they were really dangerous.