I only just got my first AOE saber attack at level 32, which hits up to 5 enemies directly in front of you. The only other AOE I have is Smash, which I believe is the mirror to Sweep. It's not actually a saber attack animation-wise in the SW's case. That is my usual follow up to Force Charge (mirror of Leap) when dealing with groups.
Btw, if you spec'd into a DPS tree then you are DPS, not a tank. Granted you get the same base abilities of the Juggernaut/Guardian AC, but the real skills for a given roll come from the tree you spec into. Just wearing heavy armour doesn't make you a tank.