There are a few. One of which is now on another LD website some of us DV members frequent. Her name is Luminous if you want to look her up here. She's a Natural who's been doing it since she was about 5 or 6. She actually just had a non-Lucid about a week ago, the first for her in years.

As for non-Naturals, I think Walms can do it every night. Someone else can correct me here, but I think iadr is another one. Not sure about any others.