Okay, here are a few more (quirky) ideas for enemies...
Mouse droid bombs that target you and chase you around the level - instant panic. ;-)
Some BIG fast fish...anything from Naboo would do.
Jawas with Ion-canon...who can destabilize your personal shield generator (and weapons) and make you vulnerable to attack. Of course, if you capture an Ion canon, you can have some serious fun...
A Swoop gang, on swoops, firing at you. Then you can do the trick with the lightsaber and cut their front ends off.
A Hutt on an armoured Repulsor sled constructed from salvaged Droideka parts (including a working shield generator) as an end-of-level boss.
A Crimson Guard cult.
Guess that's it for now...