Wowzer, I am astonishingly late to the party! Still, thanks so much for tagging me here @PamCotton 
I have to say that I am no expert when it comes to the native integrations of HubSpot but I thought I’d share my insight anyway, haha.
Generally speaking, I am a big fan of Panda Doc. It works really well when you want to grab data from somewhere and automatically merge it into a document to be signed.
My favorite use case would be something along the lines of:
- collecting info through (e.g.) Typeform
- passing the collected data to Hubspot
- simultaneously grabbing the data, sending it to Panda Doc, and merging it with an existing template in order to create a doc to be signed
I work for Make (formerly Integromat) which is a visual platform that lets you connect pretty much any apps and automate all sorts of tasks. It, therefore, comes as no surprise that I build my own automated workflows using our tech 
If you’d like to check out the options, you can have a look at the pre-built integrations of both HubSpot and Panda Doc and see the available features & functionality 
Have an exquisite day, everyone!