Hello @R2rhoney!
Thank you for letting us know, we would love to work with you to help set up a product demo and potentially get you in touch with our sales team if we are the right fit.
You are correct, unfortunately workflows does not currently support 0auth 
Someone from your Github org should be able to generate a personal access token for you to use to set up the Github Resource to connect it with your Retool app.
What is the action in the Retool app which is to slow? We might be able to help you find another work around or trigger and pass data into a workflow from an event in the app.
We also have office hours Tuesday and Thursday where you can join us and we can help you live on Discord. More information on that here.