Jason Host of Evil
I'd say the Alien Hive for sure there is just far to many for even a Sith Lord can handle
but u have to remember the force can affect a large area like force push will push anything in a sorta cone shaped area and in a cave would cruch 30-50 at a time, another good weapon would b force speed and lightning; u cant hit something if u cant catch it and with force lightning (if u ever played Knights of the old republic) can zap a good number of people when fully trained to its peak.
It would probably go a little like this:
Vader enters the hive
the aliens pour out of the entrance tunnel
force push blow them all back
force lightning fries about 10-18 at a time(its a constant chain so it will only stop when he commands it) 2-3 times over
light saber cut a few up (they cant sneak up on him because of his force senses detects all life around him like a nonstop sonar)
Boom another force push
-repeat till queen joins -
lightsaber throw at queen
using force lightning with both hands(more powerful because of concentration of force energy) causes a force storm that fries a large number
after hitting queen catches saber force speed to queen passes under her legs slices off her tail
more force push to knock away the minions
beheads the queen (force jump/speed)
finishs the rest with force push/lightning/lightsaber combos
makes some one-liner and walks away