Runes of Magic (F2P, item shop with rentals

) does have a dual profession system, but it is very limited compared to GW. I don't play WoW, but everyone I've talked with in RoM says the game is very very much like WoW. It is fun in its own way, but the combat is rather clunky compared to the fast paced multi-monster / limited skill bar design of GW. Has a much more involved crafting system for runes, weapons and armor, compared to GW.
If you enjoy combat with heroes/pets, then Ether Saga Online is a lot of fun. Another F2P (item shop, but just for vanity stuff mostly), but the pet part of the game is similar to using a hero, but you can fuse with it to gain its attributes, meld pets together to create something new; playing with just 1 at a time, but having 4 total available to use, can give them skills and equipment. Similar to charming animals in GW, you capture your pets, difference is just about all of the monsters can be captured and used a pet. Not sure if I'd want to see that in GW2 or not!

Oh, and the graphics are "ultra cute", but they grow on you. Besides, my little Shenzu Ranger is just so adorable.
Atlantica Online has mercenaries, but uses semi-turn based combat like a strategy game. Again, F2P with Item shop, very little character customization (at least so far for me), nice combat graphics, but the other graphics are so-so and the interface is a bit old fashioned with tiny text.
I haven't found much else that is very GW-like so far.