It depends on if you're horde or alliance, but I'll try to think of things you may have missed other than major quest zones:

-There's a named ray named King _____ (forget) in Zangar somewhere north above the area with all the starving tangled elementals in the SW. He drops a quest item.
-In Hellfire there's a named Arrakoa up above in that place in the SW of the zone. He also drops a quest.
-The Alliance can go do horde's mine quests north of Thrallmar. Not sure if Horde can do the Alliance's
-There's a bird escort way to the east of Auchindoun
-Sporeggar gives some new quests at friendly, I think

-Generally there are many, many quest hubs per zone. If you even missed one of them, that could be 10+ quests right there.