Hi,
I believe I understand your question.
You know what you want - a dynamic form creator, and you don't want to write this form creator by yourself.
All of the modules mentioned are good, and will help - if you decide to write the project by your own.

But - if there is something ready - you want to use it.
I am in the same situation, and with the same needs. I found this node by searching "dynamic form", since I need this kind of a tool as well.
Do you have any direction ?
TIA,
shushu