Force Unleashed was incredibly fun, but also incredibly short. I'd beaten it before realizing it was actually a platformer. I'm not sure really what I was expecting going in, but I didn't expect to be in replay mode after just a few hours.
I haven't played FU2 but I hear it's pretty much along the same lines as the first. Which is to say, lightsaber swinging, force lightning frying, force pushing guys off cliffs kind of fun. But still relatively short.
Another game I found fun along the star wars(ish) line was Soul Calibre 4. Sure the inclusion of Vader, Yoda and The Apprentice was nothing but a blatant money grab in the form of name dropping, but they were incredibly fun to play and the game was fairly solid as fighters go. Not exactly in the realm of "single player" per se, but I figured it deserved the tip of a hat.
SC4 owner here too. I didn't think of it as a "Star Wars" game exactly as well.
Also I have the first Empire at War game. I guess Steam is selling both together or just the first one that I already own?