Awesome question
Z3TA 2
Drummatix Metal
ReaSamplomatic5000
ReaEQ
Reaverb
Z2 gets me any synth sound I can want, Bass included. I really like the Jupiter 8 more but Z2 is damn close and far more versatile D also has lots of onboard FX that are quite useable.
Drummatix Metal is simple and VERY versatile Drum VST - Yes it will do electronica. Spend the $30 and be amazed.
ReaSamp covers that territory/Sample whatever I need from Z2/Drummatix
EQ/Verb pretty much staples.
Anything else is just gravy. (And I do like gravy...