We get a lot of mileage out of Butler for Trello (in combination with Zapier, pipes.digital, Trello mail-in to process App Store notification mails, etc).
Not the op but I use Butler Bot (which is different from their powerup). It's been awesome--I use it automate moving tasks around on my lists based on conditions (like cards due today are pushed to the top), for creating recurring tasks or posting reminder comments. It can basically be programmed to do almost anything for you.
I second this request, especially since I only learned of pipes.digital through this thread and checked it out and find it extremely interesting. Hope to hear back from you!
https://butlerfortrello.com/
No affiliation, just a happy user.