With this mod you can set entities and players on fire with torches. 
This works with normal torches as well as copper/redstone/soulsand torches.
Soul Sand Torches make Players/Entities burn for 8 Seconds, while the other torches make them burn for 4 Seconds.

If there's a specific version (for now only versions 1.14.4 and after) with a modloader(fabric,forge or neoforge) that you need, you can request it in the comments
(you're free to put this mod into your modpacks)