Great list of resources! I used a lot of these when building our first custom block.

I would like to say Ahmad's Gutenberg Boilerplate plugin was an extremely helpful resource as well.

We recently released our first custom block on Organic Themes for creating personal profiles. I documented the process of building the Profile Block, and we have released it as a free download, https://organicthemes.com/create-custom-block-wordpress-gutenberg/