http://www.twitch.tv/cohhcarnage is a rather family friendly variety streamer. Be aware, though, that he does stream 18+ from time to time(he'll make it known in the title, though).

http://www.twitch.tv/giantwaffle is primarily a minecraft streamer, and he generally doesnt curse and explains what hes doing. Beware, he does do nightstreams with Lirik, including cussing. He'll announce these, though.