Evanescence, Within Temptation, Nightwish, Lacuna Coil all have no swearing, (well Ev and LC do on later albums, but we're talking songs from the past few years and not the early 00s.)
So, all of Fallen, Angels, Memories and Stand my ground, Heaven's a lie, Swamped, Our Truth, I wish I had an angel, Nemo, Dark chest of wonders, I could go on... (Some of the lyrics from Fallen are really dark though, Haunted, Tourniquet and Whisper spring to mind.)
Linkin Park songs from Hybrid Theory and Meteora are fine, and I believe all of Slipknot's Volume III is clean (the word 'bitched' in Duality not counting it seems, because you hear it on radio edits!)
Seether's Broken is beautiful and takes me right back.
My Chemical Romance are pretty good. (Anyone seen pictures of Gerard Way recently? He looks so cute!)