Hi jhonnmick, welcome to the forum!
As was mentioned above, there are a lot of modules that produce less regular (e.g. chaotic, random) control signals.
However, I actually think that there also is a lot you can do with standard LFO modules, because LFOs can be easily added/mixed to obtain complex shapes.
I like to think of this analogous to “additive synthesis” for timbres, just at a much slower rate.
The obvious advantage is that you can tailor the signal very precisely. You can add/mix just a few or many LFOs, and having control of frequency, scale, offset and shape of each, you can pretty much produce any shape you like.
I especially like Bogaudio’s LLFO for this. It’s small and can be driven polyphonically. And you can cross-modulate frequencies via the V/Oct input.
There is another example here: