I'm not sure this has been effectively requested before, but I would like Nashorn to be added. Nashorn is commonly used and created for the Custom NPC's mod found here: https://www.curseforge.com/minecraft/mc-mods/custom-npcs. It allows you to add scripting to the objects and NPCs that the mod previously mentioned contains. This can be extremely useful when you need a trader to offer different stock options based on dialogue choices or to script a "scripted door" to change texture and open only with a key, other item, or if a quest has been completed. Overall it expands the options that custom NPCs offers.
Here is the link to Nashorn: https://www.curseforge.com/minecraft/mc-mods/project-nashorn
Thank you for your time,