If you use a daw that uses the vst format, head over to kvraudio.com cuz there is no best plugins and a huge percentage of them do similar things.
[Retired alotta vsts including omnisphere but if using another daw for collabs in fl studio, I like serum/sylenth and nexus]
1. Omnisphere(Have this, and still only use it very basically....)
2. Yamaha Cs V80 Arturia (bass only, efx, pads)
3.Curve2 (for bass only)
5. Kick (Sonic Academy)
4. bi Filter(Reverb)