Samurai, Valkyrie, Ranger, Monk, Gadgeteer, Bard.
Just sayin'
my current party:
Myles & Vi
Fighter - extremely useful, hits for up to 35dmg at a time, lots of hp and a great tank
Rogue - skilled lockpicker, very fast, frequently hits two time in a round, can operate a bow, highest body count so far
Samurai - also very fast, frequently gets multiple attacks, knows basic offensive spells so isn't useless in ranged combat
Priest - heals and buffs everyone, kinda ok
Psionic - fragile but devastating with high dmg spells like ego whip, psionic flames or mind stab, useful debuffs like insanity, sleep, or terror
Gadgeteer - most useless so far, does only mediocre damage with his omnigun, not sure if I should get rid of it and give him something else?