I am sure that if you search for candle in this forum, you’ll find a solution that works for you. I uploaded an example a few years or months ago. Also Eric (Bdesign) posted a great example of an animated candle flame.
But as a quick solution I would prefer to do it in post. Otherwise emissive material combined with an IES Profile and image styles will be your best friend.
Hope to see your results here.
Cheers
Marco