It's hard in nano tanks. Most of the "big names" have too much flow for tiny tanks with LPS and softies.
I've use Jebao SLW/MLW, MOW, the Hygger Mini, Nero 3 and 5, MP10. They all have benefits and drawbacks, but I'd say the Jebao stuff has been the best bang for the buck, and they come in a wider range of flow options (i.e. MLW-5, 10, 20, 30) to fit more tank sizes.
The Hygger mini was a nice, TINY wavemaker, but the controler sucks. If they had that updated with more control over patterns and timing, I'd own SEVERAL of them. As it is, I think the MLW-5 is probably the best nano, controllable wavemaker out there right now.