I think OP is really only interested in lights (at least in this round) with infinitely variable "ring" type of control. QTC from Peak uses a push button at the tail. Although variable, not "ring" controlled.
"Ring", the way I understand it, should be a separate component on the light. If you turn the head or the tail to adjust the brightness, those are called twisties, not ring. There is no ring, you are turning the head bazel or the tail cap.
So far, magnetic ring is the only ring controlled light I have seen. I have not seen any light with mechanical ring control whereas the ring has any physical attachment to the inside of the light to adjust brightness.