Render multiple comps at various settings + still of each using token naming
I have a project that has within it 4 comps that are the same material, but with different formatting, aspect ratio, etc. I need to find a way to hit a single button, and trigger automated actions to render each of the 4 comps to mp4 using automated naming (Project_Comp.mp4), then render a specific still for each as a poster frame (Project_Comp.jpg) into the project folder.
This needs to be automated (single action renders all) because I will be again and again making a copy of the template project folder, renaming the project, swapping out text and images, then rendering the batch of various format outputs. It would be very time consuming to set up all the renders each time.
I'm looking into token naming now, and assuming that bit will be easy, but ot sure how to set up the automatic render actions. My first inclination is to just save the template with a render queue ready to go... but not sure if that would reflect changes made after reopening the file with new name, and also I need mp4 which AFAIK uses ME render rather than AE's queue.
Happy to look up whatever I need, but time crunched, and hoping to at least get a few pointers as to correct terminology, etc to get this going today.