Probably doesn't count as a launcher as such, but the 2001 Matoran were great at disc throwing. They were accurate and had good distance. I also really like the Midak Skyblasters, since they can hold 4 zamor spheres, and they look good - However sometimes the trigger could be a bit stiff and thus hard to use. The worst would probably have to be the squid launchers. I've never had one myself, but I've heard some bad things about them.