Arturia Sound Explor. Coll. Belledonne

Arturia's collection is not sample based (like the competition), but an amazing emulation of retro hardware synths, effects, and utilities such as compressors. This may be heavier on cpu cycles, but if you own newer hardware you will not notice it. Alternatively you can alway's 'print' your stems to save resources. I rate a 5 on cpu utilisation, because I use a MBP m1, and I'm sure there are people with desktops dedicated to production which are way more powerful.
If you have any doubts try out the demo's, you won't be disappointed.