I like quad lfo and voltage block from Malekko, but I can’t say I love them to death. I wish VB worked closer to a smooth motion recorder rather than sequencer of voltage values, and quad lfo could be modulated by external cv and not just having its own sequencer and ability to sequence different paraments internally.
Many people like Maths, Batumi and Zadar, or some random stuff, but having just two ad envelopes from Maths is just not enough for me, even with self-patching etc. Batumi and Zadar have too few controls, but Zadar might be more interesting of the two.
I guess you need a really clear understanding of how you want to interact with your system, what balance of intention vs random or generative modulation, its very personal.