Well, a LSer can always just spam Force Wave until everything dies. You should have enough FP for it. And consulars aren't all that bad in melee unless you're playing with a balance mod that puts their BAB to where it should be -- Obsidian gave all classes equal BAB (bad idea, but in this instance it helps). Provided you took melee powers and feats, of course.
Korriban's a bit difficult, since there's that section where you can't regenerate FP. I got through via melee with my consular/Watchman, but I had to expend a fair amount of shields and medpacks to do it.