Basing these off of the octowow database and their models, may need verification.
One-handed swords:
Bokken lv.1
Simple Katana lv.10
Reforged Blade of Heroes lv.33
Ginn-su Sword lv.36
Hushblade lv.38
Wicked Mithril Blade lv.40
Joonho's Mercy lv.45
Runesword lv.46
Doomforged Straightedge ...