abacab
I would probably say SynthMaster too.  And since you already have version 2.8, you may want to check out the crossgrade to SynthMaster One for $29.  It's only got two oscillators, but they sound good, and plus they have added 100 wavetables.  The simplified GUI makes dialing in a new sound a snap.  It might be great for what you want to do.

I gave synthmaster one demo a try the other day and loved it! so ill be getting it today as its a no brainer. The sounds are fantastic i thought and the price as you said $29 how can you go wrong...i forgot to mention z3ta+2 it was about $59 and that thing was amazing! its not the nicest to look at but sounds great. 

ZincTrumpet
Synthmaster One but before that it was Hybrid.

I like the 3 oscillator per layer setup in Hybrid 3.  It is a cool combination of subtractive and wavetable synthesis that can result in some very interesting, evolving sounds.  If you spend any time with it you will appreciate what it can do.  It seems to be somewhat undeservedly under-rated.  Try the demo and see.
 
Easy to tweak, with over 1200 interesting presets covering all types, and some very useful performance controls that makes morphing in real-time easy.

It offers two complete layers, parts A & B, each with 3 oscillators.  Each layer has it's own filters, envelopes, LFO's, and step sequencers.

The first two oscillators have 100 wavetables each, in addition to saw and square waveforms.  The third oscillator has saw, square, and triangle, and can also be used as a sub or noise oscillator.
 

Well i pulled the plug and just bought synthmaster one and its fantastic its so light on the cpu just like its big brother synthmaster, i do like hybrid 3 i forgot all about that beast and the subtractive and wavetable synthesis makes for some great sounds! cheers 

Waves Codex, though I'll second Waves Element.

I still like Alchemy as my go to......with the amount of great sound libraries it has, I sometimes forget the reason I fired it up in the first place.

Omnisphere and Serum

Kontakt.  Sometimes for drums, often for bass, usually for pianos/EP/Organs, acoustic instruments.
 
At times in the past, Rapture was a go-to as it's fairly easy to get some unique textures out of it.  Dimension Pro got a lot of play because it had a variety of interesting sounds.
 
Triangle II and Pentagon used to see a lot of action as well.
 
I only recently picked up Synthmaster, but I can see why you might want to put that on everything if you were primarily into electronic music.  It's capable of a pretty wide variety of good sounds.
 
 

Synthmaster. Upgrade it to everything bundle and get synthmaster one free. You will get 3.0 free too in the future.

musichoo
Synthmaster. Upgrade it to everything bundle and get synthmaster one free. You will get 3.0 free too in the future.

Any word on when synthmaster 3.0 is coming out?

coltpeacemaker

Any word on when synthmaster 3.0 is coming out?

Maybe 12 months?  This thread is from KVR forum.  SM3 should have wavetables like SM One, with the addition of a wavetable editor.
 
Synthmaster 3 what can we expect
https://www.kvraudio.com/forum/viewtopic.php?f=98&t=466501