From what I've experienced in game during beta and during my early access and from what I've been reading in the forums, the Sorcerer seems to be the "face melting" DPS way to go as far as force users go. The sorcerer seems to be the most popular as of now. You might want to check out some sorcerer videos on YouTube and see what think about that as an alternative. They will give you more of that Mage/Warlock type experience from wow. I'm currently leveling a Sith Inquisitor sorcerer and so far I love it. Ranged DPS with some melee attacks. And who wouldn't want to shoot lightning from their hands?
Hmm.. that throws even more into the mix. I think I'll need to just watch a heap of videos from the Sorcerer, Assassin and Marauder and try to see which looks the coolest and most fun.
It's hard to tell which one does the most damage though. One of the videos I saw for the Assassin had PvP footage where his level 41 was fighting against a 17 and it still took more than a hit or two to kill him but then he was fighting somebody closer to his level and it didn't look like there was much difference between the time it took to kill the level 11 or the higher level.