in that case, iād go with either arturiaās pigments, uhe diva, or uhe repro.
pigments is the most versatile, has sampling & wavetable engines, endless modulation possibilities and decent built in fx and a sequencer. itās probably got a steeper learning curve because of all the options, but it sounds amazing and youāll find lots of tutorials on youtube.
either uhe option is good, with diva being the most āanalogā virtual synth youāll find and repro is basically a prophet clone, if thatās your thing. i donāt own repro, but iāve almost bought it a couple of times, iāve been using diva for 3 years. i canāt image thereās a sound you could think of that you couldnāt make with diva.
iāll give honorable mentions to unfiltered audioās lion and bx oberhausen. i use both of them and you can pick them up on sale at plugin alliance for $15-20, making them great 2nd options. and if you need something for acid, abl3 is the best youāll find.
if you get to the point where you want really wild options for crazy sound design and less conventional workflows, i can give you a few options there too.