I'm pretty sure Zeb shoots is big gun too. Haven't tried him yet.
There's a couple of figures you'll be able to play with without melee. Han, Chewy, Luke (gun I think), Leia, Kannan also has a gun, Zeb I'm pretty sure, Sabine and I'm sure some of the Force Awakens figures will have good range attacks.
If you are a Star Wars fan and an Infinity fan, I don't see how you could go without playing the playsets... but that's just my opinion!