Is there a batch tool, program or script that could take many 3D model files and automatically create a few PNG/JPEG images of different angles for each one?
What 3d format are your files using?
Here's a script for 3ds Max: https://www.scriptspot.com/3ds-max/scripts/quick-batch-render and there are quite a few of these out there.
Grab your favourite 3d software, animate it in the needed angle and view, then render out the single images :)
EDIT, i overlooked the "many" part. Please ignore.
You could download Unity and then get a plugin from the assetstore to do this, there are multiple for that
After much searching I found this tool that does exactly what I need.
Beyond that, since I already had gifs that were generated by the software I use to make my models with (Kenney Shape), I found the excellent program Shutter Encoder that would allow me to perform batch operations on multiple gif files at once to either split them, convert them to WebM format, convert them to mp4 H246 (youtube) and do a whole range on cool operations like slomo, interpolation - all with a few button presses.