I was looking for a nice flame that I could attach to a small LED flashlight for a candle display, I couldn't find quite what I needed, but weirdnoise's "twisting flame" was a good start. I took that and modified it in mesh mixer, adding a few other shapes and some hand sculpting.
I posted a few different versions, with different heights, wall thicknesses, and throat sizes. I'm still new to this, so there are some imperfections in the models. You might want to look them over if you're going to print them.
I posted a picture of the working model. It was printed in orange translucent PLA in vase mode on an Ender 3 Pro